4. During the 1800s, the development of the free enterprise system in the United States had which effect? A) It encouraged entrepreneurship and technological innovation.
B) It pressured the government to enact and impose protective tariffs.
C) It led to expanded union membership and improved working conditions.
D) It reduced the economic gap between rich and poor.

"neither slavery nor involuntary servitude, except as a punishment for crime whereof the party shall have been duly convicted, shall exist within the united states, or any place subject to their jurisdiction." - the thirteenth amendment to the united states constitution, 1865 which statement describes the effect that the thirteenth amendment had on american society? a) male freedmen were given the right to vote. b) slavery was made illegal in the united states. c) ex-slaves were given united states citizenship. d) southern states were no longer allowed to use convicts as labor.