Examine the extent to which Lincoln believed preserving the union held greater importance over abolishing slavery. APUSH.
a. Lincoln prioritized preserving the union and viewed it as paramount to abolishing slavery.
b. Lincoln considered both preserving the union and abolishing slavery equally important.
c. Lincoln initially favored preserving the union but later shifted towards prioritizing abolition.
d. Lincoln's primary focus was on abolishing slavery, with preserving the union as a secondary concern.