If a Profit-Maximizing Firm Shuts Down in the Short Run

Multiple Choice

If a profit-maximizing firm shuts down in the short run, it must be true that before the shutdown, at all positive output levels,

A) average total cost was less than average variable cost
B) fixed cost was greater than total revenue
C) variable cost was greater than total revenue
D) profit was zero
E) total cost plus total revenue was less than profit