In "Mother to Son," how does Langston Hughes use the image of a person climbing a broken staircase? A. as a simile that compares the relationship the speaker has with her son to the staircase B. as the resolution to the conflict faced by the speaker, whose life has been difficult C. as a metaphor for the poem's main idea that a person should keep trying in difficult circumstances D. as an allusion to a famous fairy tale about a princess who must escape hardship by climbing steps