Answer:
The railroad boom began in 1862, when president Abraham Lincoln signed the Pacific Railway Act. This act offered two companies land along its right of way in order to speed progress. What railroad had a more difficult time with building their rail line due to the Rocky Mountains.
Explanation:
The correct answer is D) Compromise of 1850.
The Compromise of 1850 was a law that would temporarily settle the conflict over whether or not slavery would exist in the new territories gained after the Mexican-American War. The Mexican-American War saw the United States gain control of modern day California, New Mexico, Utah, Arizona etc.
At this time, the issue of slavery and its expansion was a hotly debated topic. This is due to the fact that Congressmen from slave states wanted these new territories to allow slavery. While the Congressmen from free states did not want slavery to expand. This is because expanding the institution of slavery would result in an imbalance of free and slave state representatives in Congress.
They needed a bill of rights to persuade people that the federal government would protect their rights. To protect the Liberty of each individual.