How did the new weapons used during World War I make this war the first modern war in history? (give examples)

The new weapons in WW1 made it the first modern war in history because, this war involved different types of weapons such as tanks, tear gas,  better guns, etc.

i do believe its (d) it allowed the government to offer pioneers sixty acres of western land if they lived on it and made improvements to it.

explanation: signed into law in may 1862, the homestead act opened up settlement in the western united states, allowing any american, including freed slaves, to put in a claim for up to 160 free acres of federal land. by the end of the civil war, 15,000 homestead claims had been established, and more followed in the postwar years