As the slave overseers had ultimate authority over slaves and treated them with excess cruelty, the part of that aggression may have been out of resentment because they blamed the slavery for making them do mean things.
During the slavery era, majority of the enslaved Africans were employed in plantation agriculture. Although some others were domestics and worked as butlers, waiters, maids, seamstresses, launderers, carriage drivers, hostlers, stable boys etc.
But these slaveowners often used aggression may have been out of resentment because they blamed the slavery for making them do mean things. Therefore, the Option D is correct.
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