The newspaper headline below describes a significant event in U.S. foreign affairs.
DAILY NEWS

- MAY 7, 1915 -
LUSITANIA SUNK: OVER ONE HUNDRED AMERICANS LOST AT SEA

How did this event contribute to the United States' entry into World War I?
A) It encouraged anti-immigration campaigns in the United States.
B) It became difficult for President Wilson to defend a policy of neutrality.
C) It became necessary for President Wilson to propose a plan for peace.
D) It furthered anti-government protests in the United States.