In the long run, profits will equal zero in a competitive market because of

In the long​ run, profits will equal zero in a competitive market because of free entry and exit.

Because there is free entry in a market, the competition can come and go as they please.  This stops the ability for a company to have a monopoly because any company can come and sell the product. Companies are also able to leave a market but they may leave behind their goods without profit. 

Amuscle thats keeping you from having  pain.

D. centrally planned economy hope this ! : d