What was one way the united states changed because of land grants made to private companies? a) the granted land allowed transportation and communication infrastructure to spread, increasing western development. b) the granted land increased the amount of land for sale in the country, causing more money to flow into the economy. c) the granted land made it more difficult for americans to move west because most of the land had been given to corporations. d) the granted land made transportation, such as railroads, slower because companies had to use land that was not ideal for transportation.