What Was the Finding from the Study on Positive Emotion

What was the finding from the study on positive emotion and health conducted by examining photos from Major League Baseball players in the 1952 baseball register

A)  Smiling was not related to health indexes. 
B)  Those who smiled more tended to live longer. 
C)  Those who smiled more tended to live longer but the findings were limited to African-American and Hispanic players only. 
D)  None of the baseball players were smiling in their photos.