Which statements describe reasons why many Americans wanted to restrict immigration?

CHOOSE ALL ANSWERS THAT ARE CORRECT! (k12 school)

A. Many people were afraid that America would lose its identity as a white, Protestant nation.

B. Many people were afraid of losing jobs to the newcomers, who were willing to work for lower wages.

C. Many people thought that immigrants were upper-class elitists who would look down on native-born Americans.

D. Many people thought the country was full and there wasn't any room for newcomers to settle.

HELP ME PLEASE! THIS IS FROM K12 SCHOOL!! IT'S 100 POINTS!!