In colonial America, Africans "contributed" to society by being a source of income for people who bought and sold them into slavery. They also contributed by being laborers in the southern plantations.
Women contributed to the society by being a house wives --meaning they took care of the house-- as well as cooking meals for the family and taking care of the children.
Native Americans, in the earlier days, contributed by trading with settlers and teaching them how to do things in their environment.
(Sorry I really don't know what the children did)
The answer is F, they made three-fiths of the slave population apart of the whole population
I believe the answer would be the second choice.
survival of the fittest, in other words the Darwinian evolutionary theory. hope this helps!