Plant sizes get larger as you move from ATC-1 to ATC-4. Output ATC-1 ATC-2 ATC-3 ATC-4 1,500 $10 15 $ 20 $30 2,000 8 12 17 25 2.500 9 3,000 12 3,500 15 4,000 18 4,500 20 5,000 24 5,500 29 6.000 35 10 15 20 8 13 18 6 11 16 10 9 14 12 7 12 15 11 10 19 13 8 25 15 9 In the long run, the firm should use plant size ATC-4 for what level of output? O 3,000 to 3.500 O 5.000 to 6.000 Oless than 3.000 4.000 to 4500