An economy produces yoga matsyoga mats. If less than the efficient quantity of yoga mats is producedless than the efficient quantity of yoga mats is produced _______. A. marginal cost exceeds marginal benefitmarginal cost exceeds marginal benefit B. marginal cost equals marginal benefitmarginal cost equals marginal benefit C. it is not possible to be producing at a point on the PPFit is not possible to be producing at a point on the PPF D. marginal benefit exceeds marginal costmarginal benefit exceeds marginal cost