A psychological study was conducted to determine whether people apply different moral standards to themselves and to others. Each subject in the study was allowed to choose between receiving 30 percent or 70 percent of a cash prize and was told that another volunteer would receive the other part of the prize. Each subject could also have a coin toss decide the distribution of the prize at random. The majority of subjects chose to receive 70 percent of the prize, later claiming that they had acted fairly. However, when another subject group was told about the scenario, almost all said that choosing to keep 70 percent of the prize would be unfair. Clearly, most people apply weaker moral standards to themselves than they do to others.
Which of the following is an assumption required by this argument?
(A) At least some subjects were given 30 percent of the prize and felt that it was unfair.
(B) Having a coin toss decide the distribution of the prize at random would have been the most ethical option for the subjects.
(C) At least some subjects who claimed that they had acted fairly in choosing to receive 70 percent of the prize would have said that it was unfair for someone else to do so.
(D) The subjects who were told about the scenario were, on average, more accurate in their moral judgments than the other subjects were.
(E) At least some subjects who had to choose between deciding the distribution of the prize themselves and having a coin toss decide it felt that they had made the only fair choice they could.