Bertram Has Spent Years Being Concerned About His Health Even

Bertram has spent years being concerned about his health even though he has no symptoms or pain. Several years ago, he read an article on tumors and became preoccupied with thoughts about getting a tumor. He rarely seeks medical help and in fact avoids doctors and hospitals. Bertram is most likely experiencing a(n) _____.

A) illness anxiety disorder
B) somatic symptom disorder
C) dissociative disorder
D) acute stress disorder