Which of the Following Is Not a Reason Owners of Cotton

Which of the following is not a reason owners of cotton factories employed children?

A) The small size of children facilitated their movement around machines.
B) Children represented a cheap supply of labor.
C) Children made up an abundant supply of labor.
D) Children were more easily broken to the discipline of factory work than adults.
E) Compulsory education from ages five to eight meant that could follow written instructions from factory supervisors.