Final answer:
Generalized Anxiety Disorder (GAD) is a type of anxiety disorder characterized by chronic worry and fear, muscle tension, trembling, and faintness.
Step-by-step explanation:
The correct answer is a. Generalized Anxiety Disorder (GAD). Generalized Anxiety Disorder (GAD) is a type of anxiety disorder that is characterized by chronic worry and fear, muscle tension, trembling, and faintness. It is different from occasional feelings of anxiety because it lasts for months at a time.