The Aetiology of Agoraphobia Has Rarely Received the Kind of Attention

The aetiology of agoraphobia has rarely received the kind of attention that has been given to panic disorder.This is because:

A) comparatively few people suffer from agoraphobia
B) agoraphobia isn't as debilitating as panic disorder
C) agoraphobia has only just been recognized as a specific and distinct disorder in DSM-5
D) agoraphobia rarely occurs independently of panic disorder