A、They are accustomed to smoking. B、They have too much stress. C、They are teenagers. D、They find it cool to smoke. A

A single cigarette sold on a street corner may not cost a lot: however, the overall costs of smoking are huge. First, consider the cost of human life. (5) The World Health Organization says about 10 people die of a tobacco-linked disease every minute. That rate adds up to almost six million people dying from such diseases every year.
    (6)For most people, stopping smoking is hard. Many began smoking as teenagers. They are used to it. Studies show people who want to stop smoking can do so with different treatments. Other experts and former smokers offer even more effective advice: If you are considering starting smoking, don’t. Smoking costs more than the life of an individual. It can affect the health of an entire country. (7)The World Health Organization says low-income countries depend heavily on taxes from cigarettes. They use the money, in part, to pay the costs of health care for tobacco-related diseases. But the illegal trade in tobacco products is further testing the economies of low-income countries.
5. How many people die from smoking every year?
6. Why is it hard to stop smoking for most people?
7. How do low-income countries partly spend the taxes from cigarettes?