It encouraged settlement of the great Plains and the US West.
The Homestead Act of 1862 authorized United States Government to encourage the pioneers to provide them land in the West, on the conditions that they (settlers) had to build their own structures and had to live on the land for not less than five years
"If the ruling dynasty was wealthy, it would keep the Mandate of Heaven" is the best answer from the list, but it should be noted this was not always the case.
It helped power the trains and steam boats.
