Question

1. besides chemical weapons, what other new weapon helped to end the stalemate of trench warfare?

a. zeppelins
b. u - boats
c. rifles
d. tanks

Explanation:

Tanks were armored vehicles that could move over rough terrain, cross trenches, and withstand enemy fire. They disrupted the static nature of trench warfare by allowing forces to break through enemy lines. Zeppelins were airships mainly used for bombing and reconnaissance but not as effective in breaking trench stalemate. U - Boats were submarines used in naval warfare. Rifles were not a new weapon in this context.

Answer:

D. Tanks