Answer:
C. Public health
Step-by-step explanation:
We can look at the definitions of these terms and see which one most applies.
A. Epidemiology
[] "the branch of medicine which deals with the incidence, distribution, and possible control of diseases and other factors relating to health" (Oxford Languages).
B. Biostatistics
[] "the branch of statistics that deals with data relating to living organisms" (Oxford Languages).
C. Public health
[] "the health of the population as a whole, especially as the subject of government regulation and support" (Oxford Languages).
D. ePHI
[] "Electronic protected health information (ePHI) is protected health information (PHI) that is produced, saved, transferred or received in an electronic form" (techtarget.com).
Using these definitions, we can easily see that "Public health" mostly closely ties into the overall population health, hence answering our question.