it earns positive economic profit but zero economic profit
it cannot control the market priceCorrect
it is a price setter
it earns supernormal economic profits

Explanation
As a price taker, the demand curve for a perfectly competitive firm is perfectly elastic. If the firm raised its prices above the equilibrium level it would sell nothing, with customers quickly swapping to the cheaper suppliers. In contrast, because the firm can sell all that it likes at the current market price, there is no reason to sell below the market price.