The answer is: D.) a conceit .
Conceit is an extended metaphor, which consists in manipulating and contrasting something that is unusual or does not exist in order to provide a more refined comprehension.
The rest of the options are incorrect because an allegory implies that its interpretation can reveal a hidden meaning, hyperbole is an exaggerated statement meant not to be taken literally, and personification is the attribution of human characteristics to something non-human or the impersonation of abstract concepts.