Fact 1: Arteries generally carry oxygen-rich blood.

Fact 2: Smoking constricts arteries and increases clotting to block arteries.

Given the two facts above, answer the question "Smoking will decrease the flow of what in the body?" with the following options: 
- oxygen-rich blood
 - blood clots
 - preventing heat transfer
 - heat energy
 - electric current
 - all liquids
 - layers of fat
 - ashes


 

 oxygen-rich blood        