What was president lincoln’s primary motivation for directly attacking the institution of slavery?
group of answer choices

a)lincoln had long held that the abolition of slavery was more important than preserving the union.

b)following numerous union defeats in the south, lincoln moved to weaken the confederacy by dismantling the institution of slavery beacause "we must free the slaves or ourselves be subdued."

c)lincoln no longer felt the need to appease the slave states.

d)northern racial prejudices had drastically sibsided, which subsequently spurred lincoln to advance a popular election issue: emancipation