Why was the government so eager to promote the growth of railroads?

Need this !how did the war of 1812 contribute to an increase in u.s. manufacturing? a) the war provided more resources for factories to increase production. b) the war promoted trade between countries so that americans could focus on fighting. c) the war cut americans off from their previous supply of imported manufactured goods. d) the war limited transportation in america, making it necessary to import manufactured goods.

Between the world wars eisenhower's presidency the 1960s what is the organizing principle of this list?

Which of these played the biggest role in increased urbanization in the late 1800s? a) transportation improved b) the military was stronger c) no one was farming anymore d) steam power was discovered