Question

How were chemical attacks used in World War I?
O A. Poison gas was sprayed over battlefields by airplanes to weaken
enemy positions before major attacks.
O B. Chemical attacks were used to clear barbed wire from no-man's-
land so troops could advance.
C. Mustard gas, while not deadly, was used to demoralize enemy
troops prior to an attack
OD. Canisters of poison gas were launched into enemy positions so
that the clouds would kill or injure soldiers.

Answer 1

Answer:

The modern use of chemical weapons began with World War I, when both sides to the conflict used poisonous gas to inflict agonizing suffering and to cause significant battlefield casualties. ... Chlorine, phosgene (a choking agent) and mustard gas (which inflicts painful burns on the skin) were among the chemicals used.