Which of the Following Applies to Generalized Anxiety Disorder (GAD)

Which of the following applies to generalized anxiety disorder (GAD) ?

A) People with GAD often feel tired due to chronic muscle tension and sleep loss.
B) GAD most commonly begins in late adolescence or early adulthood.
C) GAD has a lifetime prevalence of about 40 percent in women and men.
D) Other anxiety disorders generally do not co-occur with GAD.