Which of the Following Best Illustrates the "Racial Threat" Hypothesis

Which of the following best illustrates the "racial threat" hypothesis?

A) passage of the Chinese Exclusion Act after Chinese workers displaced whites in mining and railroad jobs.
B) black support for constitutional propositions that increased state affirmative action initiatives.
C) greater opposition among whites to affirmative action proposals in areas with few race or ethnic minorities.
D) whites were more likely to blame blacks for black social disadvantages after passage of the 1960s civil rights acts.