Which was an important factor contributing to the Great Depression of 1929?
A. unsound expansion of credit
B. government restrictions of business activities
C. increased importation of foreign goods
D. large military expenditures

churchill warned that the soviet union had cut eastern europe off from the west with an "iron curtain."

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necessary and proper clause. the congress shall have power to all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states, or in any department or officer thereof.