The diagram above shows a situation of monopolistic competition in a state of Group of answer choices Short-run equilibrium, with an optimal price of $11 and quantity of 60 units. Long-run equilibrium, with an optimal price of $11 and quantity of 60 units. Long-run equilibrium, with an optimal price of $10 and quantity of 90 units. Short-run equilibrium, with an optimal price of $10 and quantity of 90 units