I believe the answer is C. blood vessels.
I don’t know if i’m 100% correct but I think the answer would be B , ( sorry if I’m wrong! <3 )
the correct answer is 3) a health professional who holistically manages patient care in a hospital or clinic setting. the ICHPO defines these professionals as persons who collaborate with doctors, nurses and pharmacist to provide health attention,though commonly they work also, under supervision of a health team or a doctor. Examples of these professionals are: paramedics, perfusionists, Podiatrist, Public health epidemiologist, medical assistants among many others.
The answer is 10 billion. <span />