Imagery is used to appeal to our five senses (smell, sight, taste, touch, and hearing.) Out of all the choices, B is the only one that does not use any of the five senses. 
        
                    
             
        
        
        
True, you should always be familiar with the text.
        
                    
             
        
        
        
I believe it is B - It provides momentum throughout the poem.
(please let me know if I am wrong, also I apologize in advanced just in case it is wrong.)