The Immediate Cause of President Wilson's Decision to Ask Congress

The immediate cause of President Wilson's decision to ask Congress for a declaration of war against Germany in 1917 was

A) the discovery of the German's true hostility toward the U.S.through the Zimmermann telegram.
B) German submarine attacks on five American vessels off the coast of Great Britain.
C) pressure from Theodore Roosevelt and other powerful and influential interventionists.
D) the discovery of German submarines poised to attack American cities on the Atlantic coast.