Which one of the following is true about the Calvo pricing?

A.Under the Calvo pricing, the optimal price is always below the marginal cost of production.

B.Under the Calvo pricing, we should expect the inflation to be zero since the nominal price is rigid.

C.The Calvo pricing is a form of price rigidity in the New Keynesian model of business cycle.

D.According to the Calvo pricing, firms in re-setting prices are myopic.