Critic: Works of modern literature cannot be tragedies as those of ancient playwrights and storytellers were unless their protagonists are seen as possessing nobility, which endures through the calamities that befall one. In an age that no longer takes seriously the belief that human endeavors are governed by fate, it is ttherefore impossible for a contemporary work of literature to be a tragedy. Which one of the following is an assumption required by the critic's argument? ['Most plays that were once classified as tragedies were misclassified.', 'If an ignoble character in a work of literature endures through a series of misfortunes, that work of literature is not a tragedy.', 'The belief that human endeavors are governed by fate is false.', 'Those whose endeavors are not regarded as governed by fate will not be seen as possessing nobility.']