Because of the free-rider problem, Select one:

a. the private market will generally produce the efficient amount of a public good.

b. too many people will over-consume a public good.

c. government will not be able to produce an efficient amount of a public good.

d. it is difficult to make people pay for a public good, and thus private markets will tend not to produce it.

e. people need to pay a government user fee to pay for the good's production.