By asking yourself "does believing this propaganda force me to go against my beliefs? ," you can decide if the propagandist has your best interest in mind

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.

the audience knows that nora is intentionally failing to dance correctly, but helmer doesnt

the answer is b. the tomb is underground and dark, and its opening is covered by a heavy grate.