单项选择题Once this profile is thoroughly drawn, you can begin to think about setting health priorities based on your particular portrait. For example, if you drink two martinis every evening, have a high - stress job, are overweight, smoke a pack of cigarettes a day, and use marijuana occasionally on weekends, you should quit smoking first, followed by losing the excess weight, reducing the stress of your job, giving up your marijuana habit, and then finally giving some thought to those martinis if you want to prevent first cancer, and then hean disease. Even for the youthful working person who has never been sick a day in his life, who is in excellent health, a good look at all health habits and at work and home environments may suggest changes that will benefit him in the future. If one smokes, holds a stressful job, suffers from obesity and uses marijuana occasionally, what should he do first to reduce the possibility of heahh hazards
A. Quit smoking.
B. Losing excess weight.
C. Reduce the stress of work.
D. Giving up marijuana us