In One Recent Study, People Watched Married Couples Have Three-Minute

In one recent study, people watched married couples have three-minute videotaped conversations. Participants then rated how satisfied each couple was, and these estimates were then compared to the couples' own reported satisfaction. Participants who were MOST accurate were

A) marriage counselors and researchers.
B) unmarried people.
C) people who were themselves in moderately satisfying marriages.
D) people who were themselves in either highly satisfying or highly unsatisfying marriages.