Historian: A democracy' s citizens must know some history if the democracy is to meet its challenges. However, popular historical awareness is inevitably distorted, for most people learn history through popular narratives that sustain readers' interest by implying that a few famous heroes and notorious villains have shaped all of history. The historian's argument depends on assuming which one of the following? ['Most historical narratives sustain interest by implying that a few famous heroes and notorious villains have shaped all of history.', "Only narratives written for a purpose other than sustaining readers' interest can convey an undistorted awareness of history.", 'History cast in the narrative format inevitably distorts historical reality.', 'The implication that a few famous heroes and notorious villains have shaped all of history distorts history.']