Why was South Carolina the only English colony in 1700 where the majority of the population was made up of enslaved Africans

By 1700, plantations in the Southern Colonies had come to rely heavily on slave labor. Eventually, enslaved Africans made up the majority of the population in South Carolina and Georgia. They cleared the land, worked the crops, and tended the livestock.

answer; i do believe its (b) 12.5 years of age;

what is the tax base for the sales tax?

it should be (usually ) 6%