asked 138k views
5 votes
X Which of these was a factor in the United States entrance in World War I?

X
A
B
C
the invasion of Poland
Japan's invasion of China
The Axis threat to the Panama Canal
D German unrestricted submarine warfare

1 Answer

4 votes

Answer:

D - German unrestricted submarine warfare.

answered
User Nick Vu
by
8.1k points
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