Why did some national leaders support large transportation systems?
A. The government could charge higher tariffs for getting goods to
people on the frontier.
B. It was a way to get goods to markets faster and at a lower cost,
which would help the economy.
C. Fast and low-cost transportation would reduce the need for slave
labor on farms and plantations.
O D. Building these systems would mean that land could be given to
the railroad companies.