One of the Ports That Benefitted Most from the Slave

One of the ports that benefitted most from the slave trade was:

A) Barbados, where slaves were exchanged for molasses
B) Williamsburg, where molasses was processed into rum.
C) Liverpool, where manufactured goods, such as guns, knives, textiles, and other wares would sail to Africa where the goods would be exchanged for slaves.
D) Capetown, from whence most slaves were exported.