Which of the Following Is the Best Description of a "Free

Which of the following is the best description of a "free rider"? Someone who

A) receives the benefit of a good without having to pay for it.
B) consumes a good until the marginal benefit received from the last unit is zero.
C) pays for a good but does not receive any benefit from the good.
D) does not produce any goods but is able to consume them.
E) consumes a good until the marginal benefit received from the last unit is equal to the marginal cost of producing the good.