Answer:
For Part A:
No one believes liars even when they are telling the truth.
For Part B:
"At last a Wolf really did come, and the Boy cried, 'Wolf! wolf!' as loud as he could: but the people were so used to hearing him call that they took no notice of his cries for help."
Explanation:
For Part A, the theme must be reasonable. The theme "No one believes liars even when they are telling the truth." is the most practical since it states the lesson the author wants the readers and the protagonist to learn. For Part B, the evidence best supports the theme. Because it says that the people were already not believing the boy since he called so many times as a joke. Therefore, for Part A, the answer is C, and the answer for Part B is also C.