Why do perfectly competitive firms sell their products only at the market price?
Perfectly competitive firms
a)can sell their goods above the market price because such firms are price takers with market power.
b)cannot charge more than other firms lest they sell nothing, and they have no incentive to sell at a lower price.
c)cannot sell their goods above the market price because firms are price makers.
d)can increase sales by setting the price they charge for their goods below the market price