Final answer:
The manifest functions of the health care system in the United States according to functionalist theorists include maintaining and improving health, educating patients on health risks, and creating medical institutions as centers of community values.
Step-by-step explanation:
According to functionalist theorists, the manifest functions of the health care system in the United States include:
I. To maintain and improve the health of people so that all citizens are able to fulfill their normal social responsibilities, thus contributing to social continuity
II. To educate patients on the health risks associated with harmful behaviors, such as the use of carcinogenic substances, thus helping to define normal and deviant behaviors
III. To create medical institutions, such as hospital systems, which stand as centers of community values and identities, thus serving to maintain social stability
Therefore, the correct answer is D) I, II, and III.