Which of these excerpts is most clearly an example of apostrophe?

A. “What thou art we know not;/What is most like thee?”
B. “Higher still and higher/From the earth thou springest…”
C. “Vaulted with all thy…might/Of vapors, from whose solid atmosphere…”
D.“The trumpet of a prophecy! O Wind,/If Winter comes, can Spring be far behind?”

D. "The trumpet of a prophecy! O Wind,/If Winter comes, can Spring be far behind?” is most clearly an example of apostrophe as the speaker is addressing the wind as if it were a person and asking it a question.

The excerpt that most clearly demonstrates apostrophe is option D: "The trumpet of a prophecy! O Wind,/If Winter comes, can Spring be far behind?" Apostrophe is a figure of speech where the poet addresses an absent or inanimate object as if it were alive and capable of understanding emotions or ideas. In this excerpt, the speaker is directly addressing the wind, attributing it with the ability to understand and respond to the question posed.