It was called the Basic Studio Agreement and it was signed on November 29th, 1926.
More than just a contract, the Basic Studio Agreement was the first agreement to be signed between the powerful Hollywood studios and film industry worker unions. In it, both film producers and the unions stipulated the first true agreement that would regulate negotiations related to wages, hours, grievances and general working conditions.
Answer: The KKK
Explanation: I think it's this
They came from Europe because America had a booming economy.
The role of the women expanded greatly in World War 2, including joining factory lines to produce vehicles and equipments for the men at war, as well as look after the house and the family, and save material for the war effort. Some also joined the army pretending to be male, and worked as spies, secretaries, and other jobs.
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