Brainliestttme : ) why was the launch of sputnik in 1957 important? -most in the u. s. had not thought the soviets were capable of producing satellite technology. - it made clear that the u. s. space program was dominant. - most in the soviet union had not thought the u. s. was capable of launching manned aircraft. - it established the fact that a more dangerous hydrogen bomb could be created.

your correct answer would be, a.

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.