What Is a Key Difference Between Somatic Symptom Disorder and Illness

What is a key difference between somatic symptom disorder and illness anxiety disorder?

A) People with somatic symptom disorder complain about their symptoms in vague terms.
B) People with illness anxiety disorder have few thoughts about having an illness.
C) People with somatic symptom disorder rarely visit medical doctors.
D) People with illness anxiety disorder must not display autosuggestibility as part of the disorder.