Which is a benefit of quitting smoking? decreased allergic reactions increased risk of high blood pressure increased asthma problems decreased risk of blood clot formation

I would say it would D. Decrease risk of blood clot formation.

Option D

Explanation:

The benefit of quitting smoking is that there is less or no chances of clot formation in the blood.

The smoking thickens the blood which ultimately leads to the formation of clot in the blood vessels of heart.

Quitting smoking will help in thinning of the blood and hence making it less viscous to move inside the body.

Hence, the correct answer is option D