Question

This weapon is largely responsible for cousing both sides to dig trenches for defense

A. Poison Gas
B. Airplanes
C. Tanks
D. Machine Guns

Answer 1

D. Machine Guns

Step-by-step explanation:

Machine guns make the most sense because they can spray many bullets straight across the battlefield. The trenches provide a space for soldiers to be protected an out of the gunner's line of sight.