Answer:
The answer is: b. He wanted to build a transcontinental railroad from Chicago to Northern California.
Explanation:
He was a U.S. politician, leader of the Democratic Party, and orator who espoused the cause of popular sovereignty in relation to the issue of slavery in the territories before the American Civil War.
One of his first legislative proposals was a program that included territorial expansion, the construction of a Pacific railroad, a free land (homestead) policy, and the organization of territorial governments. ‘You cannot fix bounds to the onward march of this great and growing country,’ he declared.