Which phrase from the poem is an example of a metaphor

Read this sample thesis statement and answer the question: dr. king employs allusions in his “letter to birmingham jail” to the audience make connections. based on the thesis, what is the writers purpose for the essay? a. to show how allusion can the audience create information b. to show how allusion can the audience link information c. to show how allusion can the audience produce information d. to show how allusions can the audience understand information