Mireille Began Having Brief Episodes of Overwhelming Anxiety About a Year

Mireille began having brief episodes of overwhelming anxiety about a year ago. At first she got them only in busy places like shopping malls and crowded restaurants, but in the past few months she has begun having them while walking to work or even while performing her job duties. She has called in sick every day for the past week, afraid that if she leaves her home she will have another episode and be unable to escape to a safe place. The criteria that govern decisions about abnormality are applicable in this case because Mireille's behaviour

A) is interfering with her ability to work.
B) does not bother her.
C) is normal.
D) enhances her ability to work.