All of These Statements About the Association Between Alcohol Use

All of these statements about the association between alcohol use and cancer are empirically supported EXCEPT:

A) heavy drinking increases the risk of developing cancers of the oral cavity, breast, colon, and rectum.
B) drinking the equivalent of two to four alcoholic drinks per day dramatically increases the growth of existing tumors.
C) alcohol is a known carcinogen.
D) alcohol-related cirrhosis is infrequently a cause of liver cancer.