They exhibit considerable molecular complexity and diversity
        
             
        
        
        
Answer:
E
Explanation:
In DNA molecule, the number of guanine bases will always be equal to the number of cytosine bases. Genuine make a triple hydrogen bond with cytosine. That's why the number of guanine bases is equal to cytosine bases. 
 
        
             
        
        
        
Polymers are many moments strung together. They are linked together by dehydration reactions. (Remove water)
        
             
        
        
        
I will try to answer at the best of my ability.
She may have Gastritis.
I hope this helps, and if it is wrong, I am truly sorry.