Majority Social Acceptance of African American,Asian,Hispanic,and Other Ethnoracial Groups Has

Majority social acceptance of African American,Asian,Hispanic,and other ethnoracial groups has not proceeded at the same pace as it has for many European immigrant groups-such as the Germans,Irish,and Poles who arrived in the late 1800s and early 1900s.What is one explanation for this?

A) European immigrant groups had the same skin color as the majority group.
B) European immigrant groups were more willing to assimilate to American customs.
C) European immigrant groups maintained their own ethnic enclaves.
D) In the early 20th century,southern European immigrants were considered a "model minority."