Question

Which of the following describes an advantage that secondary sources have over primary sources for historians

Answer 1

While you didn't really provide the "following" as the comment above me states, in general, the advantage of secondary sources of primary ones is that they perhaps provide a more objective or even just a broader view on a certain topic. While a primary source of the American civil war would be a letter written by a soldier, a secondary source would be a book that describes more letters taken together and discusses possible information regarding them. 

Answer 2

Answer:

they can reveal how individuals experiencing historical events actually reacted