Read these opening lines from the poem and answer the question. "let us go then, you and i, when the evening is spread out against the sky like a patient etherized upon a table; " \how do these lines establish themes in the poem? \ a. they serve as an invitation to find peace and tranquility in nature. b. they express natural beauty and the healing powers of nature. c. they suggest sickness in the modern world and the inability to act. d. they establish an optimism about healing the world and forming meaningful connections.