In the market for flu shots, why is it suboptimal to produce at the market equilibrium quantity (QMarket)? Select one: a. At QMarket, the social value is greater than the private cost b. At QMarket, the social value is less than the private lost c. At QMarket, the social value is equal to the private cost d. At QMarket, the private value is greater than the private cost e. At QMarket, the private value is less than the private cost