"Repeated Stimulation of the Limbic System by Discharges from the Locus

"Repeated stimulation of the limbic system by discharges from the locus coeruleus may lower the threshold for later experiences of anxiety. Then, through learning, controlled by the prefrontal cortex, the person actively avoids fearful situations." This quotation most clearly refers to the biological processes involved in

A) obsessive-compulsive disorder.
B) generalized anxiety disorder.
C) panic disorder with agoraphobia.
D) social phobia.