What Was the Purpose of the Immigration Laws of the 1920s,including

What was the purpose of the immigration laws of the 1920s,including the Johnson-Reed Act?

A) To open the nation's borders to an unprecedented influx of new immigrants
B) To place strict limits on immigration
C) To close off immigration to the United States from other areas of the Western Hemisphere
D) To overturn the Chinese Exclusion Act of 1882