Government intervention always reduces monopoly deadweight loss

Refer to the table above. What is the firm's marginal cost when it produces 155 units of the good?

A) $0.66 B) $1 C) $1.33 D) $1.50

For the average total cost curve of a firm with economies of scale, what happens to costs as output increases?

(A) Costs go up. (B) Costs go down. (C) Costs initially go up and then go down. (D) Costs initially go down and then go up.