By 1700,English Colonial Landowners Began to Rely More Heavily on African

By 1700,English colonial landowners began to rely more heavily on African slavery because

A) of a declining birthrate in England.
B) of worsening economic conditions in England.
C) indentured servants generally refused to work in the southern colonies.
D) the English government had come to discourage the practice of indenture.
E) colonial parliaments passed laws improving the status of indentured servants.