Answer: D) The reader and the speaker share the same essence.
This is a line from the poem "Song of Myself" by Walt Whitman. In this poem, the author states that he will celebrate himself. He then invites the reader to do so as well, because "for every atom belonging to me as good belongs to you." This implies that Whitman believes that the author and him share the same essence, so that everything that is good in one, is good in the other one.