Answer:
A. Basing historical accounts on reliable evidence.
Step-by-step explanation:
Although Greek historians were remarkable for their time, and much of what we know of Antiquity is due to them, they had some shortcomings when compared to modern historians. One of the main problems that they displayed was the fact that Greek historians did not always base their historical accounts on reliable evidence. Often, Greek historians would ignore or dismiss evidence in favor of stereotypes or biases. In modern times, historians try to stay away from this in order to provide as objective a perspective as possible.