Which Is the Best Example of Agoraphobia

Which is the best example of agoraphobia?

A) Claude once had a panic attack in an elevator,but he never had another.
B) Karen is afraid of speaking to a large crowd but does not mind being part of a large audience.
C) John has a persistent feeling of doom but has not experienced any panic attacks so far.
D) Becky rarely leaves her home except to go to a few familiar places,such as the grocery store and church,and usually only if her adult daughter goes with her.