Answer:
D. equal to MR, MC, and minimum ATC.
Step-by-step explanation:
Long run equilibrium is the equilibrium of a perfect competitive market occurs, when there is the Marginal Revenue is equal to the marginal cost and average total cost of the company product. It is the sum of all the market short run supply curve's series. So the correct option is D. equal to MR, MC, and minimum ATC.