Answer:
A) I is false, and II is true
Explanation:
Firms that compete in a monopolistic competition market will have $0 economic profit in the long run, but they can make an economic profit on the short run due to a sudden change in the demand or the supply. Economic profit is not the same as accounting profit, a firm may have $0 economic profit and still be making a huge accounting profit.
In a monopolistic competition, in the long run, the price of the good (marginal revenue) will equal the marginal cost.