An economy produces bikes and pizzas. When an economy produces 1 million bikes and 4 million pizzas at a point on its PPF, does the economy achieve allocative efficiency? The economy achieves allocative efficiency if the ________. A. marginal cost of a pizza is less than the marginal cost of a bike B. marginal benefit of a bike equals the marginal cost of a bike C. marginal benefit of a bike exceeds the marginal cost of a bike D. marginal benefit of a bike equals the marginal cost of a pizza