Why did some national leaders support large transportation systems?

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

Explanation:

I don't say you have to mark my ans as brainliest but if it has really helped you please don't forget to thank me....

when world war i broke out across europe in 1914, president woodrow wilson proclaimed the united states would remain neutral, and many americans supported this policy of nonintervention. however, public opinion about neutrality started to change after the sinking of the british ocean liner lusitania by a german u-boat in 1915; almost 2,000 people perished, including 128 americans. along with news of the zimmerman telegram threatening an alliance between germany and mexico, wilson asked congress for a declaration of war against germany. the u.s. officially entered the conflict on april 6, 1917.

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