In the above figure, at the price level of 140 and real GDP of

A) $15 trillion, firms will not be able to sell all their output.
B) $5 trillion, firms will not be able to sell all their output.
C) $5 trillion, consumers will not be able to buy all the goods and services they demand.
D) $15 trillion, consumers will not be able to buy all the goods and services they demand.

A