<span>D. imperturbable
In the passage, the correct word is "imperturbable". This is an adjective simialr to "calm"</span>
I would go with D) It helps show the author's voice because the author is saying that the person is making him sad at night so u could say he is opening his feelings.
I would say that A is the answer. B is irrelevant, C makes the point debatable as it acknowledges that not everyone has access and I feel like A is more important than D to the sort of people who would set questions
