Harker and Kletner Examined the Type of Smile Women Showed

Harker and Kletner examined the type of smile women showed in their women's college yearbook photographs and related smile-type to life outcomes 30 years later. What kind of smile predicted what life outcomes?

A) Non-Duchenne smilers were generally unhappy and depressed.
B) Duchenne smiles were related to greater health and happiness and more stable and satisfying marriages.
C) Duchenne smiles predicted success and happiness, but were confounded with the effects of physical attractiveness.
D) Duchenne and non-Duchenne smiles only predicted people's general feelings about life and not their actual competence, marital stability/satisfaction or health.