Research has indicated that:

A) in order to experience a generalized anxiety disorder, a person must have lived through a specific anxiety-producing event.
B) it is normal for an individual to feel anxious, be in a general state of apprehension, or experience psychological tension for a period of time.
C) the majority of people who live through a traumatic experience continue to have posttraumatic stress disorder symptoms for many years.
D) if loss of interest in familiar activities and a sense of detachment from others persist for two weeks after a trauma, then posttraumatic stress disorder is diagnosed.