Research on Tobacco Use Has Found That ______

Research on tobacco use has found that ______.

A) smoking bans did not reduce how many people smoked and did not reduce death rates due to CVD
B) the link between CVD and smoking is the same across cultures
C) the risk of CVD is about the same for smokers as for nonsmokers if the nonsmokers ever smoked in the past
D) when people quit smoking their C-reactive protein levels also drop