Which best describes the relationship between the developments of steam power and the railroad? a. steam power was great britain's most significant contribution to the industrial revolution, while the railroad was france's. b. the development of steam power launch the industrial revolution, while the invention of the railroad brought it to an end. c. steam power launch the industrial revolution, and the railroad allowed the industrial revolution to continue to grow. d. both steam power and the railroad start the industrial revolution, but were replaced by more advanced technologies.

C.Steam power helped launch the Industrial Revolution, and the railroad allowed the Industrial Revolution to continue to grow.

in 1803 the louisiana purchase took place, doubling the size of the country. by 1840 almost 7 million americans had migrated westward in hopes of securing land and being prosperous. the belief that settlers were destined to expand to the west is often referred to as manifest destiny.

explanation:

the emancipation proclamation was the aim of the war change to include the freeing of slaves in addition to preserving the union. the 13th amendment, which abolished slavery in the u.s. was passed on december 6th 1865.

as promised, lincoln waited to unveil the proclamation until he could do so with success from the union military advance. on september 22nd 1862, after a victory at antietam, he publicly announced a preliminary emancipation proclamation, declaring all slaves free in the rebellious states as of january 1st 1863.