Fact 1: Blood pressure is highest in arteries and lowest in veins.

Fact 2: Apocymarin raises blood pressure.

Given the two facts above, answer the question "what affects veins and arteries?" with the following options: 
- Damages them
 - Sulfur dioxide
 - Smoking
 - rays or beams
 - smoking tobacco
 - apocymarin
 - it needs them
 - heat energy


 

      apocymarin   