The Social Construction of Race Is Illustrated by Which of the Following

The social construction of race is illustrated by which of the following?

A) An olive-skinned Puerto Rican who would be categorized as "white" in Puerto Rico will be categorized as "black" when he immigrates to New York.
B) Blacks and whites in most large U.S.cities continue to live in strongly segregated neighborhoods.
C) Many white Americans have unknown black ancestry.
D) Most Americans continue to think that there are real and easily discernible differences among blacks and whites.