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3 votes
Which of the following helped turn World War I into a global war?

a. The machine gun
c. The submarine
b. The airplane
d. Poison gas

User Ian Turner
by
8.4k points

1 Answer

4 votes
C. The submarine helped turn World War I into a global war. They are offensive stealth weapons, and made it easy to attack ships without being seen.
User Max Hampton
by
8.3k points
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