According to the excerpt, the reader can draw conclusions about

by making

inferences based on Balto's behavior.

Hello. You did not show the passage to which the question refers, which makes it impossible for it to be answered. In the meantime, I will try to help.

Inferences are conclusions that are drawn from reading a text. In this case, it is only possible to answer your question by reading the text, however, we know that these conclusions are related to the behavior of a character called Balto. In this case, we can consider that the behavior of a person can bring conclusions about the personality of that character, about the tension level of a scene, about the tone and mood of a text, about the characterization of another character, about the plot stage and many other things.

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.

for me i cant do homework without music, so, i guess i would say faster with it, than without it. for me at least.