Answer: Option (A) is correct.
Step-by-step explanation:
In a cournot model, a firm maximizes its profit by selecting a quantity of output that is to be produced and assumes that all the other firms are keeping their output level unchanged.
There is output war between the firms in a cournot model. In this type of market condition, there are more than one firm and all the firms in a market are producing homogeneous products rather than differentiated products.