Hi there!
The correct answer is C, Smoking can lead to emphysema as well as strokes.
The answer would not be A because ANY tobacco is addictive to whoever uses it. It would not be B either because smoking does not relax people... but it does lower the heart rate.
So we are left with C. Emphysema is a disease that has to do with the lungs, and smoking causes the lungs to turn black, right? :)
Hope this helps!
