A free market economy with perfect allocative efficiency does not exist in reality. why?

a) decentralization of economic power in a free market economy does not allow for allocative efficency

b) the government intervention in the economy prevents the economic forces that would eventually bring the market efficient outcome

c)firms in many industries have some degree of market power and face negatively sloped demand curves, and produce a level output where P is greater than MC

D)the assSumption of profit maximization is not a realistic assumption about the behaviour of firms

e)the assSumption of utility maximization is not a realistic assumption about the behaviour of consumers