How did the sinking of the Lusitania affect President Wilson's policies? O A. He threatened to break off diplomatic relations with Germany.
B. He immediately asked Congress to declare war on Germany.
O C. He demanded an end to the British naval blockade.
D. He endorsed Germany's policy of unrestricted submarine warfare.

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Explanation:

In August 1915, a German submarine sunk the British ocean liner S.S. ... The event further strained diplomatic relations between the United States and Germany. President Wilson warned Germany that if it was determined they'd sunk the ship without cause, the United States may cut diplomatic ties and enter the war

1) union forces launched a surprise attack.

2) more confederate troops arrived by train.

3) union forces retreated.