The Forces of Supply and Demand Will Provide a Quantity

Multiple Choice

The forces of supply and demand will provide a quantity that is

A) less than the efficient quantity if a good generates external benefits.
B) more than the efficient quantity if a good generates external benefits.
C) exactly the efficient quantity if a good generates external benefits.
D) either more than or less than the efficient quantity if a good generates external benefits. It is impossible to know whether it will be too much or too little without more information.