While Driving Alone in Her Car, Sarah Suddenly Looks Around

While driving alone in her car, Sarah suddenly looks around and, for a moment, she can't remember where she is, how she arrived at this point on the road, or even why she is driving her car. Sarah is experiencing _______________.

A) derealization
B) depersonalization
C) the early stages of what will eventually become a severe psychotic disorder
D) symptoms of a mood disorder