The Sense of Euphoria That Many Drinkers Report Is the Result

The sense of euphoria that many drinkers report is the result of

A) the release of opioid peptides in the peripheral regions of the body, which eventually reach the brain's pleasure center and accounts for alcohol's slow onset of action.
B) alcohol's ability to stimulate the release of alcohol dehydrogenase in the stomach.
C) alcohol's ability to stimulate the brain's reward system.
D) the release of glucose by the liver, directly causing the reward cascade in the brain.