What is the last line of the poem in which the famous line about "mistah kurtz" is used as an epigraph?

The famous lines about Mistah Kurtz ( “Mistah Kurtz – he dead/ A penny for the old guy”) are used as the epigraph in poem The Hollow Men by T. S. Eliot. The last line of the poem is “Not with a bang but a whimper” (“This is the way the world ends/This is the way the world ends/This is the way the world ends/Not with a bang but a whimper.”).

i think the correct answer is b. phrase