What role did Minnesota have in the debate over slavery?

A. Minnesota wanted to become a slave state, even though it was a northern state.
B. A former slave moved to Ft. Snelling and because of this claimed he was then free.
C. Minnesota disagreed with slavery and decided to secede from the union.
D. Ft. Snelling was the eadquarters for the abolitionist movement.

D. Ft. Snelling was the headquarters for the abolitionist movement.