I think it would be a because you don't use diagrams to show graphs because they are themselves a diagram
The answer is a group of young girls were accused of having visions and consorting with the devil.
I would also recommend doing some reading about the Salem Witch Trials - they're actually really interesting!
C. Explicit details about how the library items are arranged.
Coordinating conjunctions bring two clauses (subject + verb + object) together. When joining two ideas, the comma is used.
Brutus claims to be an honorable man, but he stabbed Caesar.
Contrast conjunctions introduce a contradiction with what is said before (Brutus is honorable or honest, but he is a killer).