Answer:
B. Its elements always have a deeper symbolic meaning.
Explanation:
An allegory can be defined as a literary technique typically used as a symbolic fictional description or narration to express (convey) specific ideas or abstractions that are not explicitly stated in the literary work.
This ultimately implies that, an allegory refers to a symbolic fictional narration where actions, settings, characters, objects, or events are used to convey large-complex ideas that are not explicitly stated.
Hence, an allegory is a literary device used in literary works and its elements always have a deeper symbolic meaning.