which is the correct answer to this multiple choice question?

A Typical Firm's Long Run Cost Data $Average Quantity Total $Marginal Produced Cost Cost (lratc) (Irmc) O --- 50 350 320 100 320 275 150 300 300 200 310 425 250 350 640 300 420 If the long run cost structure of a typical perfectly competitive firm is as shown in the table above, which one of the following statements is TRUE? Minimum efficient scale of production is 150 units. Minimum efficient scale of production is 50 units. Internal economies are not present in the firm's technology. Minimum efficient scale of production is 100 units. Minimum efficient scale of production is 300 units