The correct answer to this question is B) They can lead historians to arrive at very different interpretations of an event.
Personal biases and points of view influence historians when they are studying evidence in that they can lead historians to arrive at very different interpretations of an event.
That is why so important that historians maintain objectivity when doing research. Understandably, each historian has its own background of studies, preferent authors and way of thinking. But historians have to set aside all of that in order to present their investigations objectively, based on facts, numbers, statistics, results that can be validated.