How Do Public Health Efforts Differ from Medical Efforts in Improving

How do public health efforts differ from medical efforts in improving the health of our citizens?

A) Medical care providers autonomously choose appropriate interventions,whereas public health care providers must engage in whatever actions legislation requires
B) Medical care providers are self-employed or agency employed,whereas public health care providers are employed by and paid through the government
C) Medical care providers focus only on individuals,whereas public health care providers focus only on aggregates
D) Medical care providers focus on disease diagnosis and management,whereas public health care providers focus on health promotion and disease prevention.