Stone and His Colleagues Had Adult Men Keep a Daily

Stone and his colleagues had adult men keep a daily diary of their moods at work, home, and in leisure activities for 12 weeks. Each man in the study also took a harmless protein antigen pill everyday. Results showed that the

A) more positive moods and events the men experienced the more antibodies to the antigen pill their immune systems produced.
B) more positive events and moods the men experienced the less antibodies to the antigen pill their immune systems produced.
C) the more negative moods the men experienced the more antibodies to the antigen pill their immune systems produced.
D) None of the above. Antibody production depended on the initial strength of the men's immune system.