Which of the Following Was Not  a Reason Why West

Which of the following was not  a reason why West Indian planters turned to slave labor?

A) Potential immigrants in England grew wary of the labor regime in the West Indies.
B) African slaves were more cost effective than indentured servants.
C) The English believed African slaves were better laborers because they were accustomed to hotter climates.
D) African slaves were less cost effective than indentured servants, but they worked harder.
E) None of these are correct.