Answer:
C. Oxymoron
Step-by-step explanation:
Oxymoron is the figurative device that has been used in the given sentence. Oxymoron is the situation where two opposite and contradictory thoughts are placed in the same sentence that presents the rhetorical point of view.
'Boneless ribs' is the example of oxymoron. The meaning of boneless and ribs are contracting where ribs means the bone while boneless means without bones.