As you age, changes affect your lung tissue, muscles and bones, which all impact your breathing. The maximum amount of air your lungs can hold—your total lung capacity—is about six liters. ... After about 35, their function declines as you age and as a result, breathing can slowly become more difficult over time.
I would go with B considering he has never tried it he is with a group of guys telling how great it is and he wouldn't want to feel left out of that circle
