What the story or person is mainly talking about.
        
                    
             
        
        
        
Taking the whole poem into account, I think the correct answer must be C.
The jar is a small, common, impersonal object, but in Stevens' view, it affects the nature, depriving it of its inherent wilderness. Although it is one of a thousand, it still has the power and dominion over nature. Its meaningless existence leaves a negative trail in this world. If the jar was regarded as faceless a person living in a highly commercialized, industrialized world, and the nature as freedom, the parallel would be all the more effective. 
        
             
        
        
        
The answer to this answer is B 
 
        
             
        
        
        
Answer:
FALSE because "Sit!" is a sentence as when you instruct a dog to sit that is a whole sentence on its own.