The greatest factor in the development of "skyscrapers" was a) the invention of elevators. b) availability of cheap iron. c) the invention of escalators. eliminate d) recovery from the great depression.

A)the invention of elevators.

it would be  

germany had to pay all damages related to the war.

and i think

germany had to take sole responsibility for the war.

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.