Question refers to the excerpt below. "the people of the state of south carolina, in convention assembled, on the 26th day of april, a. d. 1852, declared that the frequent violations of the constitution of the united states, by the federal government, and its encroachments upon the reserved rights of the states, fully justified this state in then withdrawing from the federal union; but in deference to the opinions and wishes of the other slaveholding states, she forbore at that time to exercise this right. since that time, these encroachments have continued to increase, and further forbearance ceases to be a virtue."—from the declaration of the immediate causes which induce and justify the secession of south carolina from the federal union, 1860 according to this excerpt, what issue was the main basis for south carolina's secession? election results states' rights nullification slavery