All of the anxiety disorders involve some experience of fear or apprehension. However, a feature of generalized anxiety disorder that distinguishes it from the other anxiety disorders is the presence of __________.

A) episodes of irrational panic
B) displacement
C) constant and pervasive worry
D) unpleasant physiological arousal

Generalized anxiety disorder is characterized by constant and pervasive worry about a variety of topics, situations or events, often with no obvious cause or trigger. This worry is often difficult to control and interferes with daily functioning. The other anxiety disorders, such as panic disorder, social anxiety disorder and specific phobias, are characterized by more specific and intense fears and anxieties related to certain situations or stimuli.