Although the Publication of William Petty's Political Arithmetick in 1690

Although the publication of William Petty's Political Arithmetick in 1690 raised governments' interest in public health as an element of state power, it had little effect on the health of most people because

A) the new state-run hospitals were more like prisons than places to get well.
B) medicine was not a unified practice, the causes of disease were not known, and many people were not treated.
C) municipal officials refused to implement state health policies, protesting that such policies would raise local taxes too much.
D) most people were too poor to buy the new medicines that had been developed from products discovered in the Far East or the Americas.