How is Gregory influenced by his classmates? Teacher Tamer A. Gregory feels pressured to prove himself to his classmates by getting revenge on Mrs. Wessex.
B. Gregory wants to uphold his reputation with his classmates for being a troublemaker by getting revenge on Mrs. Wessex.
C. Gregory is afraid that if he doesn't get revenge on Mrs. Wessex, his classmates will continue to bully him.
D. Gregory feels like he owes it to his classmates to get revenge on Mrs. Wessex because of how mean she's been lately.

A. Gregory feels pressured to prove himself to his classmates by getting revenge on Mrs. Wessex.

Explanation:

The short story Teacher Tamer by Avi tells of how a bright young boy in school brought a huge impact on a struggling teacher. Mrs. Wessex changed her demeanor after getting compliments from Gregory which also led to a change in the whole class's attitude towards their teacher.

Gregory is a bright student who tried hard to impress his new classmates. Though bright and even good-natured, the pressure of being similar and liked by the rowdy students in his class led him to plan revenge on Mrs. Wessex for her wrongful accusation about the spitball. This revenge was a way to prove his worth to his class and even become what Dory termed “the hero of the whole class”.  

Thus, the correct answer is option A.