Answer:
b. agoraphobia.
Explanation:
Agoraphobia: In abnormal psychology, the term agoraphobia is defined as one of the types of anxiety disorder wherein an individual feels fear and starts avoiding situations or places that cause him or her panic and makes the person feel helpless, trapped, or embarrassed. In severe cases of agoraphobia causes the person to become housebound.
Symptom: Panic attack
Treatment: Psychotherapy, exposure therapy, etc.
In the question above, Sue is suffering from agoraphobia.