What was the most devastating impact of the use of chlorine and mustard gas during the war? O a. The development of the gas demonstrated the technological and scientific superiority of the Central European powers, causing the Allies to doubt their capacity to win the war. O b. The gas lingered long after it was released, which rendered very large segments of the trenches uninhabitable, leading to the term "No Man's Land." O c. The worst effect of these chemical weapons was their initial psychological toll on the troops, who were essentially defenceless in their trenches until gas masks were developed. O d. Poison gas was extremely effective at killing large numbers of soldiers.

What was the most devastating impact of the use of chlorine and mustard gas during the war? O a. The development of the gas demonstrated the technological and scientific superiority of the Central European powers, causing the Allies to doubt their capacity to win the war. O b. The gas lingered long after it was released, which rendered very large segments of the trenches uninhabitable, leading to the term "No Man's Land." O c. The worst effect of these chemical weapons was their initial psychological toll on the troops, who were essentially defenceless in their trenches until gas masks were developed. O d. Poison gas was extremely effective at killing large numbers of soldiers.