What was the main benefit of the factory system? (5 points) a It cut costs and made workers more efficient. b It gave people their first chance to support themselves. c It reduced pollution caused by family-based power sources. d It increased the value of the workers and as a result, salaries rose.

in 1862, president lincoln's emancipation proclamation opened the door for african americans to enlist in the union army. although many had wanted to join the war effort earlier, they were prohibited from enlisting by a federal law dating back to 1792.

explanation:

i'm gonna go with d.

hope this !

that declared the nation neutral in the conflict between france and great britain