Question

Why did the United States break diplomatic relations with Germany in 1917?

A: Germany refused to accept President Wilson’s Fourteen Points.
B: Germany signed the Treaty of Brest-Litovsk with Russian Bolsheviks.
C: Germany declared unrestricted submarine warfare against all ships.
D: Germany sank the British liners Lusitania and Arabic in quick succession.
E: Germany offered to help Mexico recover Texas, New Mexico, and Arizona

Answer 1

I think maybe it was option D.

Answer 2

This link should Clarify!
http://www.history.com/this-day-in-history/us-breaks-diplomatic-relations-with-germany

Answer 3

thank you :)

Answer 4

It's C