If firms on a perfectly competitive market are experiencing positive economic profits, then we can predict that:

A$.$ more firms will enter the market, supply will decrease, and price will increase.

B$.$ more firms will enter the market, supply will increase, and price will increase.

C$.$ more firms will enter the market, supply will decrease, and price will fall.

D$.$ more firms will enter the market, supply will increase, and price will fall.