At Work,some Coworkers Are Discussing Psychosomatic Disorders

At work,some coworkers are discussing psychosomatic disorders.Which one of them has the best understanding of the term?

A) Hank,who says,"These disorders are not as bad as real physical illnesses."
B) Anna,who says,"The concept of psychosomatic disorders is outdated.The mind and body both affect physical illness."
C) Sal,who says,"I don't know why anyone would want to consciously create the symptoms of a disease."
D) Ted,who says,"If you have one of these disorders you have nothing to worry about,because it's just all in your head."