Question

arif has recently quit smoking. what benefit can he expect to occur within a few hours of quitting?
blood oxygen levels returned to normal
risk of heart disease cut in half
improved liver health
reduced coughing and congestion

Explanation:

When a person quits smoking, within a few hours, the blood oxygen levels return to normal as the body starts to recover from the effects of nicotine and carbon monoxide (which reduces oxygen - carrying capacity of blood) intake from smoking. The other options: reducing coughing and congestion takes more than a few hours, reducing heart disease risk and improving liver health are long - term benefits.

Answer:

A. blood oxygen levels returned to normal