In 1942, 120,000 Japanese Americans were sent by federal order to internment camps. Afterward, all Asian Americans (regardless of their country of origin and/or U. S. citizenship status) went from being a relatively unnoticed group to being singled out for discrimination.
This is known as .

Racial discrimination or racism.

Explanation:

Racism also known as racial discrimination is the discrimination, prejudice or antagonism towards someone of a different race hinged on one's assumption that one's race is superior in comparison to another race. A racist believes his or her race is superior while another person's race is inferior.

Racism is the discrimination against individuals based on their ethnic or racial origin and skin color. Individuals discriminate by not socializing with certain group of people.

Asian Americans were singled out for racial discrimination. Many were not allowed into the United States and those that were in the United States were given cheap labor while some opened their own businesses because the Americans were not willing to employ them.

it should be d or b but i'm sure it's d