Answer:
i think iam not sure it is C
 
        
                    
             
        
        
        
The answer is a ...........................
        
             
        
        
        
Answer:
i think its the first one (I'm not sure tho but i will leave the explianation) 
Explanation:
 Organic molecules are usually composed of carbon atoms in rings or long chains, to which are attached to other atoms of such elements as hydrogen, oxygen, and nitrogen.
(hope its clear ) 
 
        
             
        
        
        
I am pretty sure it's D) use of electrons focused by magnetic fields.