The United States is not truly pluralistic because some people live in "ethnic enclaves." many people value ethnic diversity. racial and ethnic categories do not have equal social standing. All of these responses are correct.

C). Racial and ethnic categories do not have equal social standing.

Explanation:

As per the question, the United States would not be considered truly pluralistic because 'the racial and ethnic categories do not possess equal social standing.' A truly pluralistic society is characterized by its ability to accept and recognize each other's cultural, racial, and ethnic differences and therefore, each cultural category possesses equal social standing. Such a  society displays ethical viewpoint and moral relativism. They offer equal respect, competence, and honor for each other. Thus, option C is the correct answer.