Plant Sizes Get Larger as You Move from ATC-1 to ATC-4

Plant sizes get larger as you move from ATC-1 to ATC-4. In the long run, the firm should use plant size ATC-3 for what level of output?

A) less than 3,000
B) 3,000 to 3,500
C) 4,000 to 4,500
D) 5,000 to 5,500