Why did congress impeach president andrew johnson in 1868?

a. congress and johnson disagreed about reconstruction legislation.
b. congress and johnson disagreed over america's purchase of alaska.
c. congress and johnson disagreed on the powers of the supreme court.
d. congress and johnson disagreed on whether slavery should be legal.

Match these items. 1 . stephen douglas published "north star" 2 . frederick douglass first african slaves arrived in jamestown 3 . crittenden compromise proposed kansas-nebraska act 4 . republican party extend 36° 30' line to california 5 . abolitionists servitude in exchange for passage to the united states 6 . indentured struggle between proslavery and antislavery groups 7 . jefferson davis formed to prevent spread of slavery 8 . "bleeding kansas" wanted slavery abolished 9 . uncle tom's cabin president of confederacy 10 . 1619 harriet beecher stowe