Which of the Following Best Describes How Public Health Nurses

Which of the following best describes how public health nurses (PHNs) differed from other health care professions in the early twentieth century?

A) PHNs contributed without receiving any salary for doing so.
B) PHNs created new settings where health care could be given.
C) PHNs gave care to powerless groups.
D) PHNs worked outside any organized health care system.