Southerners were especially enraged by abolitionists' funding of antislavery settlers in Kansas because
a. proslavery settlers from Missouri could not receive the same kind of funding.
b. such sponsored settlement would make a mockery of Douglas's popular sovereignty doctrine.
c. the settlers included fanatical and violent abolitionists like John Brown.
d. most ordinary westward-moving pioneers would be sympathetic to slavery.
e. Douglas's Kansas-Nebraska had seemed to imply that Kansas would become a slave state.
Answer: E