Which of these factors was not a reason why european colonists purchased african slaves as a source of labor?

the African slaves were used as overseers to force indigenous workers to complete their tasks (APEX)

They purchased slaves for cheap labor.

They threaten to have mr. jones come back and take over the farm again. the animals do not want this to happen, so they obey. this teaches the reader how manipulation is used in the farm to keep the animals together as they begin to break away from the farm rules.