Indian Territory, originally “all of that part of the United States west of the Mississippi, and not within the States of Missouri and Louisiana, or the Territory of Arkansas.” Never an organized territory, it was soon restricted to the present state of Oklahoma, excepting the panhandle and Greer county.
D is the answer the rest are reasons for causing world war 1
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Many people supported the war by many volunteer efforts. Labor efforts have changed many had to ration over Gasoline, clothes and food to support the men at war. Many of the durable resources such as cars, housing goods, and appliances were banned until the war was over. Many people also have quit their jobs, schools etc to work at industrial centers. Prices and wages were also very controlled. This was also a good time for women to step up and work to take the jobs the men had as well! There is so much more but these are a few of them.
I hope this helped you!