Darcy Is Sitting at Her Desk in Her Office One

Darcy is sitting at her desk in her office one day when,without warning,her heart begins racing rapidly,she has a sensation of being "out of her body," and she experiences dulled vision and hearing,rapid breathing,and sweating.She thinks she is having a heart attack.Nothing she is doing seems to have caused such an episode.Her symptoms most resemble

A) obsessive-compulsive disorder.
B) generalized anxiety disorder.
C) those of a panic attack.
D) posttraumatic stress disorder.