What Role Did Military Technology Play in World War I

What role did military technology play in World War I?

A) Poison gas became a highly effective means of gaining the advantage in trench warfare.
B) Military technology remained pre-industrial throughout the war.
C) A number of new weapons were developed, but none of them could relieve the stalemate.
D) The British development of tanks put an end to the use of trench warfare.
E) The development of airplanes resulted in a significant increase in civilian deaths.