an evaluation of one's performance in an academic subject
The answer is A, because the protagonist is the main character, and that's what Rider is. The other answers don't really make sense in terms of the role he plays in the story.
Hope I helped!
Answer:
D - Although I have a lot of friends, there are only a few people at
school who have really seen the true me.
Explanation:
This sentence best summarizes the work ahead, introducing the idea that he will discuss his friends, and the few people who have seen his true self. A makes sense for the subject, but introduces the topic too early for it to make sense. B makes an unrelated point, and would not work as a topic sentence but as an end point. C... I honestly don't know what this option says.