There Are Several Reasons Why the Category of "Race" Is

There are several reasons why the category of "race" is no longer considered to be identified as a meaningful force in American society because we really cannot discuss race in a "pure" sense anymore (due to the frequency of inter-relationships that have occurred) . However, another reason the authors discuss for why social scientists and ordinary citizens have begun to shy away from "race" as a category to differentiate people is

A) that people are uncomfortable with this category because it over emphasizes the power of these forces in society.
B) because people have very little understanding of the difference between race, ethnicity, and nationality.
C) because even using the word race has always had political meanings and uses.
D) all of the above