Gene Is Stopped by a State Trooper on Suspicion of Driving

Gene is stopped by a state trooper on suspicion of driving while intoxicated.Gene is considered to be legally intoxicated if he:

A) cannot recite the alphabet backwards within one hour of consuming alcohol.
B) does not have normal use of mental or physical faculties by reason of the introduction into his body of a controlled substance such as marijuana.
C) lacks ordinary control of his major body functions due to the ingestion of drugs.
D) cannot balance himself on one foot for a period of at least ten seconds.