The 1980s have been characterized as a period of selfish individualism that threatens the cohesion of society. But this characterization is true of any time. Throughout history all human actions have been motivated by selfishness. When the deeper implications are considered, even the simplest "unselfish" acts prove to be instances of selfish concern for the human species. Which one of the following is a flaw in the argument? ['The argument relies on two different uses of the term "selfish. "', 'The claim that selfishness has been present throughout history is not actually relevant to the argument.', 'The argument mentions only humans and does not consider the behavior of other species.', 'No statistical evidence is provided to show that humans act selfishly more often than they act unselfishly.']