【单选题】Which is the following statements about the first two definitions of ethnicity discussed in the first paragraph is supported by the passage?
A.
One is supported primarily by sociologists, and the other is favored by members of ethnic groups.
B.
One emphasizes the political aspects of ethnicity, and the other focuses on the economic aspects.
C.
One is the result of analysis of United States populations, and the other is the result of analysis of European populations.
D.
One focuses more on the ancestral components of ethnicity than does the other.
E.
One focuses more on immigrant groups than does the other.