How Were the British Colonies of the Southern Atlantic Coast

How were the British colonies of the southern Atlantic coast of North America different from the Latin American colonies?

A) There was no slavery there.
B) Although urban slavery was common, there was no plantation agricultural system on the North American mainland.
C) Manumission of slaves tended to be more common in the British colonies.
D) The British colonies depended less on imported Africans because of the positive rate of growth among the slaves.