The stalemate that developed along the Western Front during World War I
was largely the result of both sides:
OA. employing trench warfare techniques that made it difficult to
capture territory.
OB. constantly moving their armies between the Eastern and Western
Fronts.
OC. focusing on controlling the seas with their navies rather than
fighting on land.
D. refusing to risk heavy casualties by sending their soldiers into no-
man's-land.