Answer:
The Answer is A. Communicable disease.
Step-by-step explanation:
The activity of public health which is known to be the core or major function is minimizing or stopping the spread or transmission of communicable or infectious diseases.
A communicable or infectious disease is a disease that can be transmitted from an infected person to other people that not infected. This usually occurs through body contacts, unprotected sexual intercourse, unscreened blood transfusion, sharing of unsterilized sharp objects among others.