Which innovation had the greatest impact on westward migration immediately after the american civil war? a. telephone b. electricity c. steam-powered boats d. transcontinental railroad?

d.transcontinental railroad

Explanation:

The construction of the first transcontinental railroad began in the United States in 1863 and was completed in May 1869. The idea of building a transcontinental railroad by Asa Whitney at the congress in 1845. The railroad was built by several companies, including Western Pacific Railway Company, Central Pacific Railway Company of California and Union Pacific Railroad Company.

a more perfect union: the creation of the u.s. constitution. the vote was unanimous. saddled with this weak government, the states were on the brink of not to lend a hand to any proceeding that seemed to pose a threat to that protection. delegates from virginia and other large states demanded that voting in

although world war i began in 1914, the united states did not join the war until 1917. the additional firepower, resources, and soldiers of the u.s. to tip the balance of the war in favor of the allies. remaining neutral. when war broke out in 1914, the united states had a policy of neutrality.