The Western front 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 Western front was later reinforced by the arrival of the Americans
The correct answer is C.) - the Isthmus of Panama. Isthmus is a narrow strip of land and the Isthmus of Panama was the optimal place for a channel between the two oceans.
