Answer: C. Studying causation provides a clearer picture of historical events than studying correlation.
Correlation occurs when two events happen at the same time. On the other hand, causation refers to an event being the cause of the second one. Correlation and causation can be confusing because it is tempting to think that two events happening at the same time are necessarily connected by a relation of cause and effect. However, when causation is indeed present, it provides a clearer picture of historical events than correlation.