Which of the Following Is NOT True of Adrenergic Blocking

Which of the following is NOT true of adrenergic blocking agents?

A) They may be alpha-, beta-, or gamma-blockers.
B) Alpha-adrenergic blocking agents lower blood pressure and cause vasodilation; therefore they are frequently used as antihypertensives.
C) Alpha-adrenergic blockers are used to treat peripheral vascular conditions.
D) The principal indications for beta-blockers are hypertension, angina pectoris, and dysrhythmia.
E) Beta-blockers have many drug interactions.