How did the Columbian Exchange affect the slave trade? o It encouraged communication about the evils of slavery. It caused Europeans to stop enslaving American Indians. o It allowed people to be enslaved and transported to the Americas. 0 It caused the demand for enslaved laborers to decline.

Its C pretty sure

Explanation:

Because It says that they need a trade system that goes to the Americans and that's how they made the Columbian trade. Also they needed slaves in the Americans so they traded slaves to the Americans.  

the labor movement in the united states grew out of the need to protect the common interest of workers

for those in the industrial sector organized labor unions fought for better wages reasonable hours and safer working conditions

  in the 19th century trade unionism was mainly a movement of skilled workers.

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deists, human beings can know god only via reason and the observation of nature, but not by revelation or by supernatural manifestations

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