Which of the following best describes the system of trench warfare that
developed on the Western Front?
O A. Digging trenches helped eliminate the area on the battlefield
known as "no-man's-land."
B. New technologies like machine guns favored defensive tactics
and protective trenches.
O C. Trenches helped each side mark new positions as the territory on
the Western Front pushed into Germany.
D. Digging trenches helped establish a fast-paced war that favored
aggressive tactics.