What is the main idea of this excerpt of Abraham Lincoln’s Second Inaugural Address?

Read kabir’s poem “tell me, o swan, your ancient tale,” and answer the question. the swan is an extended metaphor. which of the following best describes this metaphor? a) the meaning of the poem’s extended metaphor is implicit rather than explicit. b) the meaning of the poem’s extended metaphor is neither implicit nor explicit. c) the meaning of the poem’s extended metaphor is explicit rather than implicit. d) the meaning of the poem’s extended metaphor is both implicit and explicit.