In the 1920s, Italian Immigrants Were Considered Dark, Strange, and Often

In the 1920s, Italian immigrants were considered dark, strange, and often subhuman by the "white" majority in the United States, who were then primarily of northern European descent. But today, the descendents of these immigrants are considered ordinary "white" folk. This demonstrates the concept of:

A) segregation.
B) nationalization.
C) incorporation.
D) indoctrination.
E) assimilation.