When a Firm's Average Total Cost Curve Is Downward-Sloping

Multiple Choice

When a firm's average total cost curve is downward-sloping,

A) one firm can charge a higher price than multiple firms.
B) one firm can always produce more cheaply than multiple firms.
C) multiple firms in a market can charge a lower price than one firm.
D) a larger number of firms in a market is better than a smaller number of firms.
E) multiple firms can produce more cheaply than one firm.