Answer: C. Free Verse.
Step-by-step explanation: Free verse is a literary device in poetry that doesn't have limitations of regular meter or rhythm, and doesn't rhyme. Free verse is also called "Open format poetry" and even if it doesn't have a regular rhythm, meter or structure and it doesn't rhyme, it stills provides and artistic expression. Many recognized authors often wrote in free verse, like Walt Whitman and T. S. Eliot.