Marvella has recurring bouts of trembling and shaking, dizziness, chest pain or discomfort, rapid heart rate, feelings of unreality, hot and cold flashes, and sweating. She feels that she is going crazy. Marvella is showing the symptoms of:

A) a panic attack.
B) posttraumatic stress disorder.
C) agoraphobia.
D) generalized anxiety disorder.

Panic Attack

A sudden episode of intense fear that triggers severe physical reactions when there is no real danger or apparent cause.

Trembling

Involuntary shaking or quivering of the body or parts of the body, often resulting from fear, excitement, weakness, or illness.

Dizziness

A sensation of spinning around and losing one's balance, often associated with disturbances in the inner ear or the vestibular system.