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.

- "a new era of american politics began with jackson's election in 1828, but it also completed a grand social experiment begun by the american revolution. nevertheless, jacksonian democracy represented a provocative blending of the best and worst qualities of american society."

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the conditions that made the byzantine empire vulnerable to attacks by the muslin turks were the sack of constantinople by western crusaders, the conquests of the sultanate of rum, presence of rival kingdoms and finally the set up of fiefdoms at the empire which were owned by the ghazis (turkish warriors).