Four Months Ago, Rosa Started Drinking One Alcoholic Beverage to Relax

Four months ago, Rosa started drinking one alcoholic beverage to relax enough to go to sleep. Soon she was having two drinks each night, and recently, she has increased to three drinks. So far, this drinking has not significantly affected her work or relationships, although she does not feel very alert when she awakens each morning. Rosa's pattern of psychoactive drug use would be classified as

A) intensive.
B) compulsive.
C) instrumental.
D) social-recreational.