Why was it more difficult for Chinese immigrants to enter the United States in the late 1800s than it was for European immigrants?
A.
Chinese immigrants could only be admitted at a single immigration station.

B.
Chinese immigrants were more likely to be sick or disabled than European immigrants.

C.
U.S. English language tests were specifically designed to be challenging for Chinese immigrants.

D.
U.S. federal laws prohibited the immigration of Chinese laborers who were not U.S. citizens already.