单选题 Since most, if not all, learning occurs through ______, relating one observation to another, it would be strange indeed if the study of other cultures did not also illuminate the study of our own.

A、 assumptions
B、 experiments
C、 comparisons
D、 repetitions

【正确答案】 C

【答案解析】根据此空后面解释说明的部分“relating one observation to another”，可推断此处应填C项。