Abolitionists often opposed annexation of western territories because they
a. feared the addition of antislavery states.
b. thought the land was too far away.
c. feared the extension of slavery
d. wanted to protect the indians.
i think it's c or d

The correct answer is C. Feared the extension of slavery.

Abolitionism was termed as the movement which was taken to end slavery. Groups in eastern Europe organized on how to abolish enslavement for Romans in Moldavia and Wallachia.

Mauritania was termed as the last country which abolished legal slavery.

Abolitionist were termed as the minority of Americans who proposed emancipation of slaves and also to have equal rights from Americans to Africans.

They believed that slavery was a sin. The first abolitionist was William Lloyd Garrison.