An explicit detail is one that is fully expressed or revealed without ambiguity or vagueness. It normally involves numerous pieces of information that will help the reader effectively understand the context and content of what the transmitter of the message is trying to convey.
The passage "This is a cold room in University Administration, wood-walled, Remington-hung, double-windowed against the November heat, insulated from Administrative sounds by the reception area outside, at which Uncle Charles, Mr. deLint and I were lately received." is an explicit detail as it tries to give a very detailed explanation about the room in which the author, his uncle Charles and Mr. deLint were received.
Answer:
Because they weren't completely unified. Many of them disagreed on whether they should force Britain to give in to their demands or completely break free. And some of them didn't even want to break away from Britain.
Answer: The role that social media played during the Arab spring
The best analogy would be C. coherent : to place
Hope this works! :)