Answer:
D. State Law
Step-by-step explanation:
The reporting of communicable diseases to a state department of health is primarily governed by state laws. Each state in the United States has its own laws and regulations regarding the reporting of communicable diseases. These laws typically require healthcare providers and laboratories to report certain communicable diseases to the state health department for monitoring and public health purposes. The specific diseases that are reportable and the reporting requirements may vary from state to state. While federal laws and regulations may provide some guidelines and requirements, the primary authority for reporting communicable diseases lies with the individual states.