The African-American under slavery faced many hardships for the family unit as the forces of separation were always imminent through the selling of members, escapes, death by diseases, the emancipation of some or other forms of disruption.
It was very difficult to form and maintain the whole family together: sometimes, two slaves of different owners married, living far from each other, meeting only when permitted; sometimes, parents and children worked and lived together; at some places marriages among slaves were not allowed or discouraged.
The separation of family members was frequent because male adult slaves had higher working value; it was common to sell male children and the fathers. After the separation, mostly, the time the children were kept by the mother. Finally, without male members, having a female-centered family, composed of mother and daughters was the most usual form of family structure.
So, the right answer would be c. largely female-dominated.