A Firm Experiences ________ When Its ________ as Output Increases

Multiple Choice

A firm experiences ________ when its ________ as output increases.

A) economies of scale;long-run average cost curve slopes downward
B) diseconomies of scale;average total cost curve slopes downward
C) economies of scale;long-run average cost curve shifts upward
D) diminishing marginal returns;average total cost curve shifts upward
E) constant returns to scale;long-run average cost curve shifts upward