Until Recently, Clark Stretched Crusts at a Local Pizzeria

Until recently, Clark stretched crusts at a local pizzeria.One day, he showed up 10 minutes late with beer on his breath.(He had a couple of beers a few hours before coming to work.) When asked by Kent, his supervisor, whether he had been drinking, he told the truth and said that he was not drunk but only energized.He then proved his assertion by stretching pizza crusts twice as fast as either of his two co-workers.Concerned that others would think that drinking before work was an acceptable behaviour, Kent decided to make an example of Clark.He sent Clark home about an hour into the shift and told him that he would receive his final cheque in the mail.Which of the following is most likely true?

A) Firing Clark was justified whether or not he posed a serious threat to the safety of the workplace.
B) Firing Clark was not justified because his job performance was unaffected.
C) Firing Clark was justified because to do otherwise would have been to condone Clark's behaviour.
D) Firing Clark was justified because Clark drank alcohol within 48 hours of a shift.
E) Firing Clark was justified only if he was a known abuser of alcohol.