African slaves were brought to the English colonies to meet the demand for

Asoldiers brought about by wars with Native Americans
BLabor brought about by large scale farming
CLabor brought about by large scale mining operations
Dsoldiers brought about by wars with France and Spain

Verified Answer :

African slaves were brought to English colonies to meet the demand for :

Blabor brought about by large scale farming. 
During that period, we still hasn't developed modern technology to handle large-scale production, so people rely on slaves to do the Grunt works in the plantation