Reggie and Ebony's parents assign them different tasks. The parents assume that Reggie will work at his father's tax preparation company so he is asked to practice mathematics and help organize paperwork. Conversely, they assume that Ebony will find a husband and have kids, so they ask her to take care of chores around the house. The differential treatment provided by Reggie and Ebony's parents can be explained by
a. Hormone theory.
b. Complimentary needs theory.
c. Social-role theory.
d. Parent gender bias theory.