Which of the Following Facts Would Be Most Helpful to the Nurse

Which of the following facts would be most helpful to the nurse who is creating a campaign to prevent teenagers from using alcohol?

A) The number of advertisements for alcohol that are currently being published in national magazines and newspapers
B) The number of lead characters in national TV series who consume alcohol on camera
C) The number of local physicians who stress avoiding alcohol use while examining their teenage clients
D) The prevalence of alcohol use among students in the nurse's school