In the 1830s, Reacting to Nat Turner's Rebellion and the Growing

In the 1830s, reacting to Nat Turner's rebellion and the growing abolitionist movement, southern slaveholders developed the argument that slavery was a positive good. Which of the following assertions was NOT part of their proslavery argument?

A) Slavery was a beneficial status for blacks, as they required white guardianship.
B) Slavery was sanctioned by the Bible and history.
C) Slavery was more consistent with the humanitarian spirit of the age than the northern wage labor system.
D) Slavery's opponents could build no persuasive argument against it.