What reasons did US abolitionists have for objecting to slavery?

Abolitionism in the United States was an expression of moralism, and frequently had a religious component to it: slavery was incompatible with Christianity, according to the many religious abolitionists. It often operated in tandem with another social reform effort, the temperance movement.

what are two things that greatly the american economy after the war? the huge buildup of u.s. military the beginning of the korean conflict the creation of the gi bill the marshall plan for nations

i believe out of the choices it is a.