Answer:
D. funded through public finance measures such as taxation.
Step-by-step explanation:
Public goods are not necessarily provided in the free market, although it may be the case.
For this reason, governments take the function of prodiving public goods such as roads, elementary schools, and hospitals. Because the government does not produce as much wealth as the private sector in a market economy, what the goverment does is taxing the private sector to obtain the necessary funds to provide the public funds.
In case taxation is not enough, the government issues debt, and in extreme cases, prints money, a practice known as seignorage.