According to researchers, this drug might be effective in preventing relapse in recovering alcoholics.

A) acamprosate
B) dopamine
C) nicotine
D) phenal-benzoate

Acamprosate has been shown to be effective in reducing the symptoms of alcohol withdrawal and decreasing the likelihood of relapse in recovering alcoholics. It works by stabilizing chemical imbalances in the brain caused by chronic alcohol abuse. Dopamine and nicotine are not typically used to prevent relapse in alcoholics, and phenal-benzoate is not a known medication for treating alcoholism.