Is characterized by an intense fear of being in a situation from which escape is not possible or in which would not be available if one experienced overwhelming anxiety or a panic attack.

Agoraphobia. Agoraphobia is an irrational and intense fear which a person experiences when she is on some place where she feels that escape would be difficult or impossible (for example: a lot of people on one place, wide streets, train or bus trips, cinema, theaters...).

It’s either d or b ! but it might be b