Being rich doesn't mean happiness. A survey with a wide coverage shows that only one-third of those who think they are rich feel they are happy. For the above argument to be true, which of the following must be true? ['More than one-third of those surveyed who did not consider themselves wealthy felt that they were happy.', 'Of the respondents who think they are rich, the remaining two-thirds feel unhappy.', 'Many people who think they are rich are actually not rich.', 'The criterion of happiness is the self-perception of the parties.']