​Which of the Following Is Most Accurate About the Effects

​Which of the following is most accurate about the effects of community and media health campaigns to reduce rates of smoking?

A) ​The percentage of people who quit is very low, so these programs do not work.
B) ​If the message reaches thousands of people, ultimately large numbers will quit.
C) ​Campaigns alter acceptance of smoking, but this does not affect smoking rates.
D) ​Systematic review finds these campaigns neither raise quitting nor lower rates.