When students receive negative criticism generated by computer programs, they are less likely to respond positively than when the critic is a human. Since the acceptance of criticism requires that one respond positively to it, students are more likely to learn from criticism by humans than from criticism by computers. Which one of the following is an assumption on which the argument depends? ['Unlike human critics, computers are incapable of showing compassion.', 'Students always know whether their critics are computers or humans.', 'Criticism generated by computers is likely to be no more or less favorable than that produced by human critics in response to the same work.', 'Students are more likely to learn from criticism that they accept than from criticism they do not accept.']