Why Was Mary Richmond's Work So Important to Social Work

Why was Mary Richmond's work so important to social work?

A) She helped social workers looked at each family members as individuals.
B) She propelled social workers look at issues surrounding gender biases.
C) She propelled social workers to think beyond the family by understanding that families are also situated within broader communities and social systems.
D) Helped social workers place an emphasis on teaching parents appropriate parenting skills.