Question

historians make interpretations about events based on

novels based on the past.
the opinions of journalists.
interviews with citizens.
the evidence they collect.

Explanation:

Historians rely on evidence (such as primary sources like documents, artifacts, etc.) to make interpretations about historical events. Novels are fictional, journalists' opinions are subjective and not historical evidence in the strict sense, and while interviews with citizens can be a form of evidence in some modern - historical studies, the most fundamental basis is the evidence they collect (which can include a wide range of historical records).

Answer:

the evidence they collect.