Marti Keeps Going to His Doctor Out of Fear That

Marti keeps going to his doctor out of fear that he has cancer.He has gone three times this month already to have his doctor check and double check various parts of his body for cancer.When his doctor asks him how he feels,however,Marti says he feels fine.What disorder is Wayne most likely suffering from?

A) conversion disorder
B) illness anxiety disorder
C) somatic symptom disorder
D) factitious disorder