Japanese American Women and Men in the United States Became

Japanese American women and men in the United States became live-in domestic help for whites in large numbers between 1910 and 1930 because

A) their entire family could live and work together in an apartment provided by the employer.
B) immigration rules limited the types of jobs they could hold.
C) of race and gender discrimination in factory employment.
D) the free housing allowed them to save money.