The answer is B. "He asked himself where it had come from and how; the past provided no explanation, and the future could not justify it."
This option is not a dark humor because it does not show the opposite side of happiness. The other choices explain that although there is happiness, he considered it as a burden- making it a dark humor.
The second one
is the best
The answer would MOST LIKELY be C, since lain is the verb.
A topic sentence should make clear what the paragraph is about and express a view about the subject matter.
