Question

Why do you think researchers chose to begin with cigarette smokers opposed to other types of addiction ?

Answer 1

I believe that smoking is more common of addiction meaning more people need help, you gonna help a lot people that smoke or just one person addicted to something else?? I dunno though.

Answer 2

Since smoking is very popular. (1 billion people smoke) It would be very important if they start with researching about smoking, so they can hopefully reduce the amount of smokers in the world.