A Nurse Who Is Studying Chronic Disease Considers the Multifactorial

A nurse who is studying chronic disease considers the multifactorial etiology of illness. What does this imply?

A) Genetics and molecular structure of disease is paramount.
B) Single organisms that cause a disease, such as cholera, must be studied in more detail
C) Focus should be on the factors or combinations and levels of factors contributing to disease.
D) The recent rise in infectious disease is the main focus.