All coffee drinkers in an office ought to contribute equally to the fund that pays for the office' s coffee, because, although some coffee drinkers would prefer to pay for their coffee by the cup, or in some other manner, it is better if everyone who drinks the office' s coffee provides the same amount of support to the fund. The reasoning in the argument is most vulnerable to criticism on which one of the following grounds? ['It offers two alternatives that do not exhaust the possibilities available and then treats those alternatives as the only possible ones.', 'It applies a double standard whereby one group of people is judged wrong and another group judged right for engaging in similar behavior.', 'It offers, in place of support for its conclusion, a mere restatement of that conclusion.', 'It uses emotionally charged terms to characterize unfairly the position it attempts to refute.']