The Ku Klux Klan virtually collapsed in the late 1920s when

Athe immigration restriction laws of the early 1920s were repealed.

Bthe organization was publicly exposed as a corrupt and cynical racket.

Cthe advent of radio led to a new level of public knowledge and tolerance.

Dthe Klan proved unable to implement its program.

Eboth political parties sharply criticized the Klan as un-American.