Why did eight southern states walk out of the democratic party convention of april 1860?

On April 23, 1860, the Democrats come across in Charleston, South Carolina with the objectives of confirming their platform and suggesting a presidential nominee. Stephen Douglas of Illinois appeared like a respectable choice to many party members. But the Southern Democrats despised Douglas; for even if he was not totally disparate to slavery in the West, he required to bind the institution's use in the grounds. The Southerners just could not stomach such a view. After numerous days of quarreling, fed-up representatives from ten Southern states walked out of the convention on April 30.

i believe the correct answer is b.