Answer:
a. Slavery existed in New England, Middle and Southern colonies, with the highest concentration in the South.
Step-by-step explanation:
This is the statement that most accurately describes slavery in the early colonial period. During this time period, slavery existed in New England, Middle and Southern colonies. However, most slaves were located in the South. As the economy of the South grew with cash crops, and the North became more industrialized, the difference between the regions became more clear, until slavery was only a feature of the South.