Why does macbeth give the order to have banquo and his son killed?

Hope I help

He worries that Banquo will be suspicious of Duncan's murder, since he was there when Macbeth received the prophecy that he would be king. He also wants to avoid a “fruitless crown,” so he decides to kill Banquo and his son Fleance in order to ensure that none of Banquo's “issue” take the throne after him.

:)

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.