It Is Difficult for the Market Process to Provide Public

It is difficult for the market process to provide public goods because

A) private firms generally cannot undertake large-scale projects.
B) it will be difficult to get potential consumers to pay for such goods because there is not a direct link between payment for and receipt of the good.
C) consumers do not really want public goods, even though such goods are best for them.
D) individuals are generally made worse off by the production of public goods.