Sadie is so fearful of being overwhelmed by anxiety that she rarely steps outside her apartment. i he thought of going shopping and getting lost in a crowd terrifies her, so she has her groceries delivered. because of her fear, she earns her living as a freelance writer, working at home. sadie's behavior is most characteristic of a) agoraphobia. b) generalized anxiety disorder. c). somatoform disorder. d) obsessive-compulsive disorder.

A) agoraphobia.  

Explanation:

Agoraphobia: The term agoraphobia is one of the types of anxiety disorder that includes a person who feels fear and tends to ignore situations or places that cause the person to get panic, helpless, trapped, and embarrassed, etc. The disorder is often listed in the DSM-5 manual as an anxiety disorder.

In other words, an individual dealing with agoraphobia tends to avoid the situation that makes him or her feel anxious and where help isn't possible.

It can be treated through exposure therapy, but for the specific person, it is often difficult to get over with the problem.