Answer: A. common law
(also pay close attention, everyone's answers are different and by that i mean for example my 'common law' was shown as option 'c' if that makes sense but all in all the answer is common law.
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)
To fund libraries, local community projects, and building roads and such.