I think it would either be c or d... 
        
             
        
        
        
Answer:
The circulatory system, also known as the cardiovascular system, is a simple loop which starts, and ends, with your heart. It is a closed system, meaning blood does not enter or leave the system during its journey from your heart to your body and back again.
Explanation:
 
        
             
        
        
        
C-All of the inner planets are smaller than outer planets.
-Steel jelly
 
        
                    
             
        
        
        
A product of photosynthesis is glucose which is a sugar. This sugar(glucose) is food for the plants.
        
                    
             
        
        
        
The complementary anti-codon will be ATG, iff an mRNA codon reads UAC. ATG or also AUG is defined as the codon for methionine which means the translation initiation codon. The codon AUG, start codon is the first codon messenger of RNA (mRNA) transcript translated by a ribosome.