this is a microeconomics question i need help with, thank you

The figure below depicts the short-run market equilibrium in a perfectly competitive market and the cost curves for a representative firm in that market. Assume that all firms in this market have identical cost curves. Entire Market Single Representative Firm Price ($/unit) 300 500 700 Quantity (Number of Units) Quantity (Number of Units) Given that the current equilibrium price is $8, what will happen to the number of firms in this market in the long run? Multiple Choice O The number of firms in the market will rise as firms enter the market in response to positive economic profit. O The number of firms in the market will fall as firms exit the market in response to negative economic profit. O It is impossible to determine whether the number of firms in this market will rise or fall. O The number of firms in the market will not change unless there is a change in either demand or in the cost of production.