For perfect competition to? arise, it is necessary that market demand be

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For perfect competition to? arise, it is necessary that market demand be...

A.large relative to the minimum efficient scale of a single firm.

B.inelastic

C.perfectly elastic.

D.elastic.

E.small relative to the minimum efficient scale of a single firm.

If firms in a perfectly competitive market are making an economic? profit, new firms will enter. This entry shifts the market

A.supply curve? leftward, and the market price rises.

B.supply curve rightward and the market demand curve leftward.

C.demand curve? rightward, and the market price rises.

D.demand curve? leftward, and the market price falls.

E.supply curve? rightward, and the market price falls.