Concept:The dialogue uses exaggeration and a reference to something outside the text to create effect.Explanation:The barber claims his clippers are so fast that he can shave an entire battalion between one coup and the next.This deliberate overstatement is hyperbole.The mention of soldiers and a coup is an allusion to military takeovers and army life.Therefore, the prominent literary devices are hyperbole and allusion.Answer:A. hyperbole and allusion