I would say the best answer is B. A subtopic within the main topic
Hope this helps :-)
What word in what sentence, i could help out possibly c:
They locked themselves in the basement to hide from the people trying to take them
I would say that he had ambivalent feelings that one the one hand his killing an elephant would seem like an affront to the culture of the Burmese and as further evidence of British imperialism in disrespect for the natual heritage of their country while on the other hand if he didn't kill it he would be considered not responsible to the townspeople who were threatened by it.