Answer:
d. all of the above.
Explanation:
Improper lifestyle causes most deaths. First of all, it is about such factors as smoking (26 percent of deaths), a sedentary lifestyle (24 percent) and malnutrition (12 percent). Scientists call a number of other components of an unhealthy lifestyle that adversely affect its duration - including alcohol abuse. Tobacco use is the single largest preventable cause of death, and currently, according to the World Health Organization, one in ten adults in the world is killed by smoking. Tobacco is the leading cause of lung cancer, and it accounts for more than two thirds of deaths from this disease in the world.