The answer is D. 
Sensory neurons carry information that is from your sensory receptors all of your body/skin. The sensory neurons carry this information of a stimulus back to your Central Nervous System (CNS). 
The motor neurons will carry the necessary commands from your CNS back to your muscles or glands for a certain action to be done.
        
             
        
        
        
I believe for a male its 26
        
             
        
        
        
It could damage vessels and other parts of the body.