Answer:
Gas Poisoning
Explanation:
World War I marked one of the biggest jumps forward for weapons of death and destruction. Many who came back were affected for the rest of their lives by the mustard gas that they were exposed to in the trenches of France.
<span>Assuming that this is referring to the same list of options that was posted before with this question, the best option is that "fair and free elections are held" since in totalitarian states there are very rarely elections at all.</span>
