C. Native American communities occupied vast acres of desirable land.
I don't see the things i am supposed to check, but i will still answer your question. The most important reasons why WW1 started was because of Militarism, Alliances, Imperialism, and Nationalism.
The Social Gospel Movement is your answer .-.
<span>The greatest challenge of the United States during World
War II is the filing of military supply orders. They suffered lack of resource
support in their fighting forces. And this reason gave them a challenge on how
to win the war. So they decided to mobilize their resource, this mobilization
includes training of their personnel and production of their weapons and equipment.
This industrial mobilization of resources gave them a bigger chance to attain
victory in the World War II.</span>
