Federalism and the 10th amendment work together--the 10th Amendment states that if something is not covered by the Constitution and there is no specific federal power, then the power goes to the state.
Federalism is the principle that government should be divided between a central power and regional powers. In the case of the 10th Amendment, if the central power doesn't have explicit power to do something then the states have the power to do so.
It's a departure from the policy of neutrality because Roosevelt is no longer remaining removed from the conflict even though the US hasn't yet declared war on Germany and Japan. Previously this would be viewed as an act of war bc he is providing military aid to Great Britain and is firing at German U-boats, especially with his implementation of the shoot on sight policy of the U-boats later on(but before the U.S. entered the war).
A, D, and E.
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Shorter hours
Higher pay
More humane working conditions
There may be more, but those are the one's I'd pick.
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