The Quit Anti-Smoking Campaign Showed That Smokers

The Quit anti-smoking campaign showed that smokers:

A) are usually well informed about illnesses related to their habit.
B) don't believe that smoking can cause lung cancer, emphysema and heart disease.
C) get furious when they are not allowed to smoke in public places.
D) are not interested in giving up their habit and argue with anyone who suggests quitting.