High blood pressure is a particular danger for regular smokers (those who smoke at least four packs a week). In order to help smokers lower their increased risk, a town's public health department devised a campaign describing how regular cardiovascular exercise could help anyone lower their risk for high blood pressure.
Which of the following, if true, is the best criticism of the campaign as a method of achieving the public health department's goal?
(A) Many health problems caused by smoking cannot be prevented by regular cardiovascular exercise.
(B) Once high blood pressure has been detected, the effectiveness of treatment, including prescription medication and exercise, can vary from person to person.
(C) The campaign was directed at the entire population of the town, including the non-smokers.
(D) High blood pressure is more common in adults over thirty than it is in children and young adults.
(E) People who smoke are unlikely to take up a regular exercise regimen.