How Have Attempts to Advance Workers' Civil Rights Through Violence

How have attempts to advance workers' civil rights through violence generally been received in the United States?

A) favorably, since American domestic and foreign policy both emphasize individual legal rights and civil liberties above all else
B) unfavorably, as Americans prefer legal and electoral means of promoting the legal rights and civil liberties emphasized by both domestic and foreign policy
C) unfavorably, since the reaction is negative when the violence is within U.S. borders, but apathetic or tolerant when it is in other countries
D) favorably, since American domestic and foreign policies emphasize legal rights and civil liberties, and protest, even violent protest, is one way these things are attained