Of the Following Groups, Who Would Not Be Considered a Family

Of the following groups, who would not be considered a family according to the U.S. Census Bureau?

A) Sondra and Morris rent a house for themselves and their three cats
B) Takis and Park bought a lovely home on three acres and plan to adopt
C) Mallory, Wendy, and Chin Mae agreed to room together until they finish college
D) Yarden, Anika, and their four children live in a ranch house at the end of a quiet cul-de-sac