What is the primary function of the Centers for Disease Control and Prevention (CDC)?

The primary function of the Centers for Disease Control and Prevention (CDC) is to protect public health and prevent disease. This encompasses a wide range of activities, including surveillance of disease outbreaks, research on disease control and prevention, providing guidance for public health practices, and responding to health emergencies. The CDC's mission is centered around enhancing the health and safety of people, which it achieves through the development of evidence-based guidelines and strategies aimed at controlling infectious diseases, managing chronic diseases, and promoting healthy behaviors.

This aligns perfectly with the broad responsibilities outlined in its strategic objectives, emphasizing prevention efforts and public health preparedness. While the other choices mention important aspects of health care and education, they do not capture the comprehensive public health mandate that the CDC embodies.