Answer:
the correct answer is A please mark me the brainliest
 
        
             
        
        
        
I would say that the answer is D.
        
                    
             
        
        
        
D. <span>They all contain carbon as an important part of their structure. Hope this helps you!! =')</span>
        
                    
             
        
        
        
ANSWER: the state is called Frenzy
        
             
        
        
        
<span>The respiratory system, circulatory system, muscular system, and nervous system.
Hope this helps!:)</span>