Question

Historians are concerned with accuracy of their writings and readings but are also aware of

Answer 1

Since you provide no options,

Beside their concerns with accuracy of their writings and readings, they're also aware of the Bias that maybe exist within that writings or readings that could compromise the truth

hope this helps

Answer 2

Historians generally are, or should be, also concerned with accuracy of their writings and reading and if there's any bias in the story.History is the story of the interaction between cultures, people, environment, civilization and ideas. So there's always something to be worried about when it comes to accuracy and viewpoint of a historical event.