What does the suffix-it mean in the word optimist

 Optimist ends with the suffix “ist” not “it”. The suffix “ist” usually denotes a person who adheres to/ believes in a thought, institution etc… ... The “ist” in optimist means someone who believes in and holds to omptimism.

Explanation:

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.