Which of the following is an example of hierarchical diffusion?
a brand of sunglasses becomes popular after a soccer star is seen wearing them.
an illegal immigrant is deported from the united states.
many computer makers start to use the same type of user interface.
a popular cell-phone ringtone becomes popular around the world.

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.

i guess so you did not explain the answer clearly so i can't

i think it's b