A question that would help determine if an author was biased is whether the C. argument support the author's own political opinions?
Bias occurs when a person misrepresents a source to make it support a certain viewpoint that they are trying to prove.
An author for instance, might have certain political affiliations which they are trying to prove correct and so will interpret a historical source in such a way that it appears that the source favors their argument.
The other options are wrong because:
In conclusion, an author might misrepresent a historical source to support their political views which is why it is important to find out an author's political views on a subject to check for bias.
Find out more at https://brainly.com/question/11437127.