Why should historians consider point of view and bias when they review the historical context of an event

Historians should take into consideration point of view and bias when they review the historical context of an event, because a person's point of view or bias can dramatically influence his or her descriptions or opinions of events. As a result, historical accounts should be closely reviewed in order to separate fact from opinion.

as a result of the development shown on the graph,prices will most likely : the answer is rise

the answer is option a.