Karl Has Been Told That His Family Produces Low Levels

 Karl has been told that his family produces low levels of the enzyme ALDH. Consequently, we would expect Karl to react to consuming his first alcohol

A) with negative symptoms, including flushing and rapid heartbeat.
B) completely normally, as ALDH affects a person's response to nicotine, not alcohol.
C) by becoming an alcoholic unusually quickly.
D) by experiencing hallucinations.