At the start of the war, the North's main goal was to A. make an issue of slavery
o B. destroy the South
C. preserve the Union
D. please abolitionists

I think A. make an issue of slavery

Explanation:

The North was fighting for reunification, and the South for independence. But as the war progressed, the Civil War gradually turned into a social, economic and political revolution with unforeseen consequences. The Union war effort expanded to include not only reunification, but also the abolition of slavery.

what are you options