During the 17^th Century, Indentured Servitude Solved the Labor Problem

During the 17^th century, indentured servitude solved the labor problem in many English colonies for all of the following reasons EXCEPT that

A) the Indian population proved to be an unreliable work force because they died quickly after contact with whites.
B) African slaves cost too much money.
C) in some areas, families formed too slowly.
D) Spain had stopped sending slaves to its New World colonies.
E) families procreated too slowly.