I believe that the best answer for this question is an allusion. An allusion is a literary device where a writer refers to some other work of literature in their own work of literature in order to make some point or add emphasis. Here, T.S. Eliot is referring to Hamlet by Shakespeare. The speaker is asserting that he is not indecisive, as Hamlet is. Rather, he is like Polonius, a servant of the king in Hamlet. Polonius is a very cautious character but is overall fairly useless. I hope this helps. Don't forget to make me brainiest.
The answer is c because the subject is the topic of the story pretty much like if I where to write something about myself I would be the subject and let's say the theme is about bravery and I have to deal with that so yeah C
