B. Macromolecules is the answer.
 
        
                    
             
        
        
        
Answer: C.
Explanation: science involves data of the natural world and is gathered everyday which makes different observations b
        
             
        
        
        
 
The ER functions as a manufacturing and packaging system. #markasbrainliest
 
 
        
             
        
        
        
The answer is C you’re welcome