New Jersey Adopted a Policy of Gradual Emancipation Slaves That

New Jersey adopted a policy of gradual emancipation slaves that freed male slaves when they reached age 25. This policy meant that slave owners earned a rate of return ______.

A) of zero, because profits during the slave's working years about equaled the costs of rearing a slave.
B) that was about equal to the normal return, because the profits earned up to age 25 exceeded rearing costs by a substantial margin.
C) a very high rate of return because slaves were generally unproductive after their peak years.
D) that cannot be calculated because of a lack of data.