Concept checking is the process of a teacher asking questions to their students to make sure they understand the vocabulary/grammar you have taught them. =)
It helps develop the theme because with the teacher being strict Kevin no longer tries to get answers from his father and listens to the teacher and Kevin learns from it.
Most likely to entertain so C because it’s about memories
The answer is D. Contact someone with more authority in the company describing your complaint.
Hope this helps :)