Drawing Conclusions At first, the United States remained neutral inWorld War I. Why was unrestricted submarine warfare an important factor in causing the United States to enter the war?

On February 1, 1917, the lethal threat of the German U-boat submarine raises its head again, as Germany returns to the policy of unrestricted submarine warfare it had previously suspended in response to pressure from the United States and other neutral countries.

Explanation:

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then its a law the end

basic principles: federalism, separation of powers, checks and balances, judicial review, representative democracy, limited government, rule of law, individual rights and responsibilities, consent of the governed, majority rule, popular sovereignty, equal protection.