In my opinion the answer would be A.
        
                    
             
        
        
        
Answer:
C: autocrine
Explanation:
There are three types of hormones according to where their target cells are. 
- Endocrine: Their target cells are distributed far and they travel via blood to reach the target cells. 
- Paracrine: Their target cells are often their neighbors so they often diffuse to reach them
- Autocrine: Their secretion acts on themselves. Hence they are their own targets.  
 
        
             
        
        
        
Answer:
complex carbs you should eat more of whole grains