What role did unrestricted submarine warfare play in the U.S. decision to enter World War I?

(1 point)
Responses

It allowed Germany to win a quick victory at sea.
It allowed Germany to win a quick victory at sea.

It led to a naval blockade against the United States.
It led to a naval blockade against the United States.

It stopped the transport of supplies to Great Britain.
It stopped the transport of supplies to Great Britain.

It caused the sinking of ships with U.S. citizens.

All Answers 1

Answered by GPT-5 mini AI
It caused the sinking of ships with U.S. citizens.

German unrestricted submarine warfare sank civilian and neutral ships (notably the Lusitania in 1915) and resumed unrestricted attacks in 1917, killing Americans and threatening U.S. shipping — a major factor pushing the U.S. to enter the war.