LightbulbText from the Encyclopedia of Mental Disorders.  Answers there or in comments.  This one's trickier.

The close association in agoraphobia between fear of being outside one's home and fear of having panic symptoms is reflected in DSM-IV-TR panic disorder (PD) with agoraphobia, and [ANSWER A]. PD is essentially characterized by sudden attacks of [ANSWER B]. There may be no known reason for the occurrence of panic attacks; they are frequently triggered by fear-producing events or thoughts, such as driving, or being in an elevator. PD is believed due to an abnormal activation of the body's hormonal system, causing a sudden "fight-or-flight" response.

The chief distinction between PD with agoraphobia and agoraphobia without PD is that patients who are diagnosed with PD with agoraphobia meet all criteria for PD; in agoraphobia without PD, patients are [ANSWER C].

People with agoraphobia appear to suffer from two distinct types of anxiety- panic, and the anticipatory anxiety related to [ANSWER D]. Patients with agoraphobia are sometimes able to endure being in the situations they fear by "gritting their teeth," or by having a friend or relative accompany them.

January 4, 2010
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