Answer:
C. Imperialism led to conflicts over colonial resources, labor, and markets.
Explanation:
B is typically defined during the Great Depression Era, and is pre World War II, so it is not your answer.
D is typically defined after World War II during the Cold War, and so is not your answer. However, it is worth noting that there has been schools of thought and that Communism had already been a prevalent idea during World War I.
A is not your answer, because the Age of Enlightenment had already occurred centuries before, during the 17th and 18th century.
