By meeting the challenges of the prairie's harsh climate and poor farming conditions, homesteaders eventually settled
50% of America's urban areas, or more than 10 million acres.
50% of America's West Coast, or 35 million acres.
20% of America's East Coast, or more than 5 million acres.
10% of all American land, or more than 270 million acres.

10% of all American land, or more than 270 million acres.

Explanation:

The Homestead Act of 1862 is one of the most important pieces of legislation in the history of the United States. Signed into law by Abraham Lincoln in the midst of the Civil War, this act would eventually result in the transfer of 270 million acres of public lands - or 10 percent of the area of the United States - to private individuals.

i believe the answer is:

-   william jennings bryan is a democrat while mckinley was a republican

at that time, the segment of population that choose for democratic party were the voters with low economic background and vice versa

- william jennings has support of populists and wants to have inflation to farmers while mckinley has support of bankers and businessmen , doesn't want inflation

the fixed value of gold make the large business able to stack up their gold without   being worried that it would devaluated.

- william jennings supported the silver standard while mckinley supported the gold standard

according to jenning, using other metal beside gold could the poor people to have more purchasing power and them advance in the society.