A. The main character of the book...: 3) enjoys tricking his aunt.
B. The town where Tom lives...: 2) can be found in the USA.
C. Tom has to whitewash the fence because...: 2) his aunt makes him do it.
Explanation:
A. The text states, "Tom doesn't like to do what his aunt tells him to do but he likes to trick his aunt." This directly supports option 3.
B. The text mentions, "They live in St. Petersburg. It is a town in the state of Missouri... The town is fictional, it does not really exist but it looks like the town Hannibal, in the state of Missouri, where Twain grew up." While fictional, it is located within the USA, making option 2 the most accurate.
C. The text says, "As punishment, Aunt Polly orders him to whitewash a very long fence." This clearly indicates his aunt made him do it, supporting option 2.