Answer:
The correct answers are D, E and F. In a perfect competition system, identical products are offered, there are no barriers to entering the market, and firms are price takers.
Step-by-step explanation:
Perfect competition is a theoretical (a non possible hypothesis) situation of a market in which there is an ideal competitive situation among all the agents that make up the offer: the same product or service with identical conditions is offered by all sellers, who enter the market without major restrictions and cannot determine the price by no means, but this is purely and exclusively determined by the free play of supply and demand. Thus, none of the bidders can influence in any way the willingness to consume of the buyers, who decide based exclusively on non-market issues.