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According to auden’s “musée des beaux arts”, who understands human suffering

Which bibliography entry is written correctly and completely? a. johnson, marie. the solar age. chicago: energy options press, 2014. b. front page story. houston chronicle. 5 apr 2013. c. “will solar work? ” science news. march edition. d. friends of solar. mother earth society, accessed 15 jan 2014.

What is the message? how does langston hughes convey the message in this poem?