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What war innovation was needed to protect soldiers from the deadly power of machine guns?

A) Chemical warfare

B) Artillery

C) Trenches

D) Airplanes

User Spe
by
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2 Answers

5 votes

Answer:

Trenches

Step-by-step explanation:

took the test! good luck!

User Micessien
by
3.7k points
4 votes

Answer:

trenches

Step-by-step explanation:

trust

User Adam Ernst
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