Which of these represents bias in historical materials?
a) leaving out the viewpoint of an enemy of war
b) presenting ideas of both men and women
c) reporting on discrimination against a particular race
d) considering all cultures to be equal
: )

it is A because the enemy has a reason for fighting to not just your side.

opinion because one person might not like silk

besides the fact that abraham lincoln abolished slavery, and greatly benefit black people, he had a heavy impact of the definition of what democracy was, and should be.