Jackson,age 26,started Smoking at 16

Jackson,age 26,started smoking at 16.Recently,he used nasal spray and nicotine gum in an effort to stop smoking and he has not had a cigarette in three weeks.Jackson __________.

A) cannot avoid the elevated risk of premature death from cigarettes
B) has already reduced his life expectancy by 11-15 years
C) will probably start smoking again within six months
D) has a 75 percent chance of never smoking again