One of the Differences Between Alpha-Adrenergic Blockers and Adrenergic Neuronal

One of the differences between alpha-adrenergic blockers and adrenergic neuronal blockers is that unlike alpha-adrenergic blockers,adrenergic neuronal blockers:

A) compete with epinephrine for binding to adrenergic nerve endings.
B) compete with norepinephrine for binding to adrenergic nerve endings.
C) reduce the release of epinephrine from the adrenergic nerve endings.
D) decrease the formation of norepinephrine at the adrenergic nerve endings.