Question

How did unrestricted submarine warfare by Germany affect U.S. foreign policy?

Tariffs on European goods rose.
Immigration quotas were established.
Military involvement began to increase.
Congress adopted a staunch isolationist policy.

Answer 1

Military involvement began to increase.

Step-by-step explanation:

Answer 2

Answer: C

Explanation: As Germany engaged in USW, the US began sending weapons and supplies to the Allied Powers. The final straw came in 1916, with the British interception of the "Zimmerman Telegram," a desperate attempt by the German Foreign Minister to convince Mexico to join the war on the side of the Central Powers.