Which of the following groups took the most violent steps to discourage immigration?

1) the ku klux klan

2) sacco and vanzetti

3) the emergency quota act

4) the united negro improvement association

The correct answer is:  

1) the Ku Klux Klan

The Ku Klux Klan is the oldest and most infamous American hate groups. Although black Americans have been the Klan's main target in a long history of violence, it was also known for attacks on Jews and immigrants. Lynchings, tar-and-featherings, rapes and other violent assaults on those challenging white supremacy became a trademark of the Klan.

not really sure i needed the points. sorry