7. The long-run total cost to Firm Gamma of producing 100 units of output is $3000. If Firm Gamma's

production function is characterized by increasing returns to scale, then the firm's long-run total cost of

producing 300 units of output would be:

a. greater than $9,000.

b. equal to $9,000.

c. less than $9,000.

d. the relative cost of producing 300 units of output cannot be determined