What is one piece of evidence from "a voyage to the country of the
houyhnhnms" that shows the houyhnhnms are more civilized than typical
animals?

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.

what class or school are you in i may

a conclusion based on evidence is an example of a. inference