Smoking reduces a person's life span by an ayerage of
a. 1 to 2 years
b. 4 to 5 years
c. 10 to 11 years
d. 13 to 14 years
select the best answer from the choices provided.

D 13 to 14 years.

Explanation: Your lungs can be very badly affected by smoking. Coughs, colds, wheezing and asthma are just the start. Smoking can cause fatal diseases such as pneumonia, emphysema and lung cancer. Smoking causes 84% of deaths from lung cancer and 83% of deaths from chronic obstructive pulmonary disease (COPD).

what effect does exercise have on the nervous system?

the answer is c.

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