Answer:
The ease of entry and exit
Step-by-step explanation:
As we know that both perfect competition and the monopolistic competition are the market structures
In the perfect competition, there are no of buyers & sellers who have same product and also have free exit a& entry
But in the case of the perfect competition, there are buyers and sellers hwo have different products also there is not as ease as much perfect competition for the exit and entry
Therefore the first option is correct