Historians base interpretations of past events on? ? evidence they collect. interviews with citizens. opinions they have heard. historical novels.

evidence they collect.

Explanation:

Historians should base their interpretations of past events on reliable sources because they need to check that what they are stating is true. The evidence they collect is a credible proof that something happened. Information and ideas without evidences or documents are not likely to be checked.

answer; (73%);

answer; collective security;