What was a common belief among historians in the early 20th century that makes their sources biased?

That entire groups of people can easily be classified by stereotypical traits.

Explanation:

This was a common belief among historians in the early 20th century. This behaviour was particularly noticeable when historians dealt with cultures outside of the Western canon or people who were not Caucasian. Because many historians believed this broad characterizations to be accurate, they often did not take the time to get to know individuals more deeply, which means that their findings were biased due to their prejudice.

i believe your answer is d)

according to romans 13: 1-7, 1st peter 2: 12-14, and 1 timothy 2: 1-4, christians as citizens have specific responsibilities to a nation that gives liberties to its people. christians are obliged to live as good citizens by submitting to the human government. honor, or respect, is due to men in the high governmental station. a christian should reflect such respect not to gain some favor but because it is god’s will. peter 2: 14 notes that the purpose of the human government is to promote peace and justice in society. to submit to human government, peter includes three elements; obedience, respect, and good deeds.