Respuesta :
The use of poison gasy caused more than 1.3 million casualties is the weapon that fits each description. Hence, option A is correct.
What is chemical weapon?
Humanity suffered greatly as a result of the deployment of chemical weapons during World War I, both the aggressors and the aggrieved. It caused many people to experience long-lasting aftereffects, while also killing hundreds of thousands of people.
On April 29, 1997, the Chemical Weapons Convention control treaty went into effect, making it illegal to produce, possess, and use chemical weapons. Some types of poisonous gas chemical are Hydrogen sulfide, Arsine and Chlorine.
Thus, option A is correct.
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