A 32-year-old woman report seven, unexpected episodes of intense anxiety, accompanied by headaches, a rapid pulse, nausea, shortness of breath. During the episode she fears that she is dying, and she has presented several times to emergency departments. Each time she’s been told that she is medically healthy; she is usually reassured for time, but on the occurrence of a new episode she again becomes concerned that she has some severe medical problem. She was given Lorazepam once but dislike the sedating effect and not taking it again. She abstains from all medications and alcohol and attempt to minimize potential causes for her attacks. What is the most likely explanation for her symptoms? A. panic disorder B. somatic symptom disorder C. illness anxiety disorder D. specific phobia