Whats one possible theory for what caused the salem witch trials

Explanation:

This happened during 1692, this happened because a group of girls claimed to have been possessed by evil spirits of the devil in which saying this they accused many of their own villagers of several local women to dispose them.

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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i would say your answer would be the second option.

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