The accounting system that is the easiest to use in the medical office would be the pegboard or the write-it-once system. This is because it reduces the chance of err and saves time when it comes to listing the transactions. Also, it does not require much accounting knowledge and is perfect for easy monitoring of accounts.
Physical activity is like walking a dog and just doing day to day things with not alot of effort.
I think that it is Lung cancer that is mainly caused by tobacco