Given the History of U

Given the history of U.S. Southwest, what is significant about Mexican immigration to that area in the early 1900s?

A) Historically the Southwest had been intolerant of Mexican influence, so the new wave of immigration was a sign that times were changing.
B) The Southwest was originally a part of Mexico, so when 10 percent of the Mexican population immigrated there in the 1900s, their influence on the region was significant.
C) Historically the Southwest had belonged to Native Americans, so the new wave of Mexican immigrants displaced Native Americans from their ancestral lands.
D) The Southwest was originally a part of Mexico, so when 10 percent of the Mexican population immigrated there in the 1900s, their presence was not welcomed by Americans.
E) Historically the Southwest had been an economically depressed part of the U.S., so when poor Mexicans immigrated there in large numbers, they depressed the region even further.