stress reduction techniques at work

Psychology help !?
In an important research study involving elderly nursing home residents, psychologists Judith Rodin and Ellen Langer investigated the:
Your answer:
a – effects of relaxation techniques on psychological and physical health.
b – psychological effects, but not the physical effects, of regular exercise.
c – effects of a sense of personal control on psychological and physical health.
d – effects of a stress – reduction training program on blood pressure and immune system functioning.
C.
‘Her most influential studies were some of the earliest to establish the notion of ”learned helplessness” in nursing homes. She and a co-author, Dr. Judith Rodin, now president of the University of Pennsylvania, found that giving the elderly residents some control in their lives — such as when to watch movies, where to visit with relatives, whether and how to raise plants — they fared better. They felt better, and were more able to handle visitors and tasks in the home. In follow-up studies over the next two years they found those in the group given some control continued to be more active, and in fact, ultimately lived longer.’
Bob Stahl, Stress Reduction (Part 3 of 3)