What is the purpose of a persuasive letter? to demonstrate the steps in a process to inform readers about meaningful research to convince readers to take action or support a cause to explain a societal problem that needs to be addressed.

to convince readers to take action or support a cause

Explanation:

your answer would be a verb. because they are "doing something"

since it is asking for her reaction to elnora's trouble at school you can rule out any answers with a positive response (b). then you can rule out (d), this is because it does not show the mother's reaction but the daughter's response. that leaves you with two options (a) and (c), by looking at the options you can rule out (c) because it isn't referring back to elnora's issues at school.