How did the russian revolution impact world war i?

B. The Russians pulled out from the war, enabling the Germans to focus on the Western Front

Explanation:

I just took the Edmentum test and B was the correct answer

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.

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