When clarification leads to confusion

There are 4 friends – let me call them A, B, C and D (B being the only female in the group) for the sake of anonymity. They happen to be good friends; happened would be a better word now. A series of incidents occurred leading to a lot of confusion and a few fights. Here’s how the things went:

A and B had a fight which lead to their not speaking to each other for some time. C and D were not (supposedly) aware of it. As things turn out between friends, soon A and B were back to talking to each other although after some heated conversations/clarifications. During one such conversation B had vowed never to call A if the next call went unanswered. Of course that didn't happen and soon things seemed to be normal. But it wasn't to last long.

B spoke to C about her fight with A and inquired from C if he felt any indication of A being upset with her. C said that he felt something was wrong because when he had asked A about B, A had replied “why would she call me”. A wasn't aware of this conversation between B and C.

In one of the succeeding conversations with A, B asked A if he really believed that she wouldn't call him again. A answered in the negative and asked B what made her think so? B said that she got to know from somewhere that A had said “why would she call me” on being asked about her. When A asked “Who said this?” B wasn't willing to answer that question. A continually kept asking B the same question whenever B initiated a conversation which resulted in their not having much of conversation.

A had used the words “why would she call me” with only 2 persons C and D and had a hunch that it would have to be either of them who had said this to B. So A while having a conversation with D, asked him what all he had said to B. D was shocked by the question as he hadn't had any such conversation with B. In fact D didn't have any context of what was going on between A and B. A explained the situation to D. D didn't like it at all and blamed B for creating confusion between him and A.

It was A’s birthday. B, C and D along with another common friend had decided to buy a gift for A. B was to buy the gift online and have it delivered to D’s house. D was to handover the gift to A on his birthday. During the purchase of the gift, D had asked B to provide her account details so that D could transfer his contribution to B. B said that she would do so once the gift was delivered and liked by A. D had asked the question thrice and didn't like the response from B. In the meantime all the above mentioned things happened. So D stopped picking/responding B’s calls/SMS. D got stuck in office work and got delayed. B wasn't aware why the gift wasn’t delivered yet. C was out of town and D wasn't picking her phone. So B was worried as well as confused. D came to A’s home late at night to deliver the gift. Along with the gift they all had decided to give together D got separate gift for A while the combined gift was given with only B’s name on it.

A sensed something was wrong and asked D as to what was going on. D mentioned the conversation he had with A sometime back and also recalled an incident from the past. (The incident went something like this - B had jokingly said to A that she had a conversation with D. At that time B and D weren't quite friends so A couldn’t believe it. When A tried to confirm from D about the conversation D said he never had a conversation with B) Combining the 2 incidents D decided to close all relations with B as twice the actions of B had caused confusion between A and D. A tried to clarify B’s standpoint to D but to no avail. At that time D also told A about how the 4 of them had planned the gift and a brief of their conversations.

A called up B to understand what was going on and also convey D’s stand. They had a long conversation wherein everything - mentioned so far in the post - was discussed in details. The viewpoints of all 4 people was talked about and debated. B also said that her reason for not saying the name to A was to prevent any frictions between A and C. And B was hurt at how things turned out and blamed herself for her role in it. She also pointed a few fingers on A on his involvement. A had to agree to some of it.

The outcome of all these is as follows:

D is not talking to B
B is hurt because she didn’t intend to hurt D
B is upset with A
B is hurt for she thinks she could have done things differently
D is upset with C for C’s role in the things
A is skeptical about C
C is unaware of all these
A is upset with D’s standpoint on B

Having said this I am wondering what went wrong. Is there a chance things could have been different? If so, what could have been done differently? Was A wrong in seeking clarification as to who wasn’t keeping the conversation to himself? Was B wrong in trying to avoid friction between 2 friends? Was B wrong in trying to identify if things were smooth between her and A? Was D wrong in feeling that B was responsible for creating confusion between him and A? And subsequently severing all ties with B? Was C wrong in clarifying B’s doubts? Was B right in sharing with C about her fight with A? Was A wrong in thinking C broke his trust?

Friendship is one of the best gifts someone can have. It is to be valued and cherished. Often it is the only thing left with people when things go wrong. Here there are 4 friends who value each other and would spare no effort to make sure that their friends are fine. But the friendship is now caught in a storm. How should A, B, C and D feel about each other and what should be the state of their friendship? What can each of them do to come back to a steady state?