The Answer Is:
(A.) "Their success encouraged people to experiment and invent new products"
The Western front<span> was best characterized by trench warfare. The armies dug into the ground, both sides constructing elaborate trench networks. This caused them to reach a stalemate for most of the duration of the war.The </span>Eastern front<span> was much larger and thus did not result in the trench warfare seen in the West.</span>
It’s should be letter c for this one
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