It causes breathing problems, cancers, organ damage, changes your appearance for the worst, it smells bad, some of your friends may not want to be around you as much if they can't stand the smoke (like asthmatics), it can kill you, leaves a bad taste in your mouth, it costs a lot of money long term, and it is an addiction that is very hard to get rid of. The worst part is that you can also injure those around you in the same way with secondhand smoking.
The providing of accurate health information in such a way as to influence people to change attitudes so that they take positive action about their health.
I believe it is A because i feel it is the only exercise were you are using your arms to lift you entire body off the ground, but who knows i could be wrong <span />