Many Asian immigrants were discriminated against and efforts were made to stop their entry by which of the following:

A. The Chinese Exclusion Act of 1882
B. The "Gentlemen's Agreement"
C. The Immigration Act of 1917
D. The Tydings-McDuffie Act All of these

All of these

Explanation:

The Chinese Exclusion Act of 1882 was a United States law signed by President Chester A. Arthur prohibited the immigration of Chinese laborers.

The Immigration Act of 1917 was a United state law that restricted the immigration of people from Asia-Pacific zone because of the impose of literacy test on immigrants from that zone.

The Gentlemen's Agreement of 1907 was an informal agreement between the United States of America and the Empire of Japan in which Japan would not allow emigration of its citizens to the United States and in return the United States would not impose restrictions on Japanese immigration.

The Tydings-McDuffie Act of 1934 was a United States federal law that established limitations on Philippine immigration to the United States.