Herbert Benson Devised a Simple Procedure,called the Relaxation Response,which Can

Herbert Benson devised a simple procedure,called the relaxation response,which can have beneficial health effects.When should it be practised to experience the full benefits

A)  on a daily basis 
B)  when traditional medical treatments produce no improvement 
C)  whenever a person has to deal with a major stressor 
D)  for a minimum of 50 minutes a day, three days per week