The Immigration Act of 1965
O
prohibited US entry for victims of persecution.
restricted European immigration.
was passed to keep America ethnically uniform.
abolished the old immigration quotas.

Abolished the old immigration quotas.

Explanation:

Since the Immigration Act of 1924, immigration was based on a national-origins quota system, which provided immigration visas to 2% of the total number of people of each nationality in the United States, based on the 1890 national census.

The Immigration Act of 1965 abolished those immigration quotas and established a visa system for reuniting immigrant families and attracting skilled labor people to the United States.

c. as a force against soviet invasion of afghanistan

the answer is the government.