The most divisive issue in regards to western expansion during the antebellum era was
A. the removal of Indians.
B. the extension of slavery.
C. free homesteads for settlers.
D. property qualifications for voting.
Answer: B
Explanation: The most divisive issue related to western expansion in the antebellum era was he extension of slavery. Southerners were committed to the extension of slavery into the U.S. territories gained as a result of the Mexican-American War, and most Northerners objected to the extension of slavery.