Sudden Insight. The character has had a realization of something important.
Without the further context of the article you're on, I would say the answer is most likely C.
Dying is far more opposed than negative ideations.
Hope this helped.
The answer is:
A) Perky is one of those adjectives that sounds like what it means: cheerful and lively. Language like this helps bring color and depth to a reading and makes it come alive.