Wouldn’t mind if someone would help me .

This is so people don't repeat the crimes because we have learned from them. However, if someone were to commit the same crime we would have already learned how to stop them if we remembered such history.

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.