How Does the Text Differentiate Between Race and Ethnicity

Multiple Choice

How does the text differentiate between race and ethnicity?

A) Information on ethnic origin is easier to collect than data on race.
B) People are more willing to classify themselves by race than by ethnicity.
C) Race refers to physical characteristics,while ethnicity refers to cultural features.
D) It is possible to have more than one ethnicity,but people can be a member of only one race.