Its either A or C but im sorry i dont know which one
        
                    
             
        
        
        
Answer:
Arteries
Explanation:
There are three main types of blood vessels: veins, arteries, and capillaries. Arteries are the blood vessels that carry the oxygenated blood from the heart to various body parts. Veins pick the deoxygenated blood and deliver it to the heart to be oxygenated.  
Arteries are the blood vessels with thick walls and no valves. Blood is pumped with higher pressure from the heart into arteries. The pulmonary artery is the only exception that carries deoxygenated blood from the right ventricle to the lungs for oxygenation.  
 
        
             
        
        
        
The spinal cord is in the backbone (aka spine). The spinal cord is part of the central nervous system 
How I remember where the spinal cord is the root of the words spine and spinal cord is similar
Hope this helped!
~Just a girl in love with Shawn Mendes
 
        
             
        
        
        
The pigments phycoerythrin and<span> </span><span>phycocyanin</span>