Why did slavery continue after the revolution?

a. slave labor was important to the new england economy.
b. british, loyalists, and patriots all agreed that liberty did not extend to slaves.
c. the colonial government encouraged manumission.
d. the southern plantation economy depended on slavery.

Option D.

Explanation:

The Southern plantation economy depended on slavery, is the right answer.

The southern states of the United States relied heavily on slave labor for production. In fact, following the revolution in the United States, the economy of the south could not survive without slave labor.  Tobacco and cotton form the basis of the economy of the south, the plantation of such crops required more labor therefore, the southern planters had to continue the slave trade.

i really really really really really really dont know