Which of the Following Statements Is True of Generalized Anxiety

Which of the following statements is true of generalized anxiety disorder?

A) An individual suffering from generalized anxiety disorder experiences persistent anxiety for a maximum of one month.
B) An individual suffering from generalized anxiety disorder is nervous most of the time.
C) Generalized anxiety disorder does not have any impact on the physical health of an individual.
D) Generalized anxiety disorder is often caused due to an elevation in the levels of the neurotransmitter GABA.