Interpretative questions are those that has one or more answers that should be supported by evidences from the text. Out of the questions presented in the choices, only the second one, "Why did Marcus have such a hard time in school?" could be reasonably supported. Thus, the answer is the second choice.
The sentence having an infinitive that functions as an
adverb is ‘By late in the afternoon, we were worried to hear the reports of the
storm. ‘ Here, the verb ‘to hear’ which is an infinitive as well was described
by and adverb ‘worried’.
