The answer is c, the draft
According the the Homestead Act of 1862, the only two valid answers are A. Settlers had to promise to avoid contact with American Indian tribal lands and D. Settlers had to improve the land (e.g., by buying a house) to keep it.
The prairie settlers endured all of the following hardships except a) the sod was difficult to plow. The prairie settlers were easily able to work the land once settled into their respective homes. However, because of a lack of railroads at the time all livestock and goods were transported by agriculturists and because of the vast geography of the prairie, there were many tough weather conditions to deal with. Native Americans were also settled on the land, so this caused conflict between the two groups as well.
His first National Park was Crater Lake National Park. Roosevelt was always known as the Conservation President.
