Delta Epsilon fraternity sponsors a Beer Fest every October, where party-goers consume large amounts ...

Delta Epsilon fraternity sponsors a Beer Fest every October, where party-goers consume large amounts of alcohol. At the neurotransmitter level, what is happening to the party-goers?
 
  a. Alcohol decreases sensitivity of receptor sites for serotonin.
  b. Alcohol increases sensitivity of receptor sites for gamma-amniobutyric acid (GABA). c. Alcohol increases sensitivity of receptor sites for serotonin.
  d. Alcohol mimics the effects of endorphins.
  e. Alcohol decreases sensitivity of receptor sites for gamma-amniobutyric acid (GABA).