Why Was the Clinical Investigation of Children and Young Adults

Why was the clinical investigation of children and young adults so important in our understanding of cardiovascular disease?

A) The diseased condition begins years before any obvious symptoms begin.
B) Much of the research was focused on treatment rather than prevention of risk factors for cardiovascular disease.
C) Behavior and exposure as a youth can cause damage to the vascular system that will end in cardiovascular disease.
D) All of the answers are correct.
E) None of the answers are correct.