Answer:
focus on studying, that means they want you to be studying more than anything else, maybe even do advance studying by yourself. Do some chores as well :D when ur old enough like 15 - 16, get a partime job to help your parents. but if it effect your studyin, just focus on your studying
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!
Expository essays should be FAIR to other points of view.