A. because if you have received flyers for several times for spa treatment, then you have ore options to look at and to see so you can know what the best deal is. B is wrong because billboards ( or whatever you said) are meant to want to make you impulse buy just because someone beautiful was on the front selling a product, and it won't necessarily be good or have a good deal, or be reliable.. Hope that helped! :)
Cardiovascular exercise is any exercise that gets the heart rate up and increases blood circulation. Cardiovascular exercise utilizes large muscle groups. Aerobic exercise requires to use large muscle groups rhythmically and continuously. These muscle movement over a sustained period of time keep the heart rate to at least 50% of its maximum level.
