Sophia once found herself in a busy restaurant when she had a panic attack, brought on by stress she felt over recent health problems and deaths of her friends and loved ones. A few weeks later she experienced another attack, this time in a grocery store. Over time Sophia gradually reduced her contact with the outside world, fearful that an attack might strike at any moment, and worried that she might find herself helpless, stricken, and embarrassed in a public place. Sophia’s initial troubles have developed into __________.a. agoraphobia
b. claustrophobia
c. acrophobia
d. a personality disorder