Answer: The right answer is the B. Studying historiography.
Explanation: Just to elaborate a little on the answer, it can be added that historiography derives from the Greek historiográphos, "a person who writes history." Historiography is, therefore, the discipline that studies history, or, to put it simply, the history of history. When a historian is examining the ways different cultures studied and recorded history in the past (asking questions such as "Who wrote it?" or "What sources did they use?") and not the actual history of those cultures from the past, she is studying historiography, which will certainly help her to determine bias—since history is arguably biased and never totally objective.
