Question

choose the best answer.
abolitionists were not excited about expansion of the nation because ____
enslaved people would be used to build railroads
slavery would expand into new territories
the federalist party had no leaders in the west

Explanation:

Abolitionists opposed slavery's existence and expansion. U.S. territorial expansion raised fears that pro-slavery forces would extend the institution into new lands, which directly conflicted with the abolitionist goal of ending slavery. The other options are not the core reason for their opposition to national expansion.

Answer:

slavery would expand into new territories