What Helps Explains Personal Interchangeability in Family Relations

What helps explains personal interchangeability in family relations?

A) the ability to seamlessly shift from one role or identity to another (e.g., from "employee" to "mother")
B) a workplace policy of hiring an expendable and faceless labour force to perform dull, repetitive tasks
C) well-honed social skills
D) the selection of a spouse based on their ability to perform certain roles rather than their unique characteristics