Final answer:
Nick Carraway is referring to Tom Buchanan when he speaks of the fifth guest with 'shrill metallic urgency' in chapter one of F. Scott Fitzgerald's novel. Option D is correct.
Step-by-step explanation:
In chapter one of F. Scott Fitzgerald's novel, when Nick Carraway mentions no one was 'able utterly to put this fifth guest's shrill metallic urgency out of mind,' he is referring to Tom Buchanan. This line can be understood in the context of Fitzgerald's writing, which highlights that the characters in his stories are meant to be seen as individuals with their own unique stories rather than representatives of broader archetypes or groups.
Tom Buchanan's presence and personality are strong and imposing, drawing the attention of others and being difficult to ignore, much like the sound described in the quote.