Answer:
A: Juxtaposition
Explanation: Because they're comparing two different things like when she's saying she has the body of a weak and feeble woman, but the stomach of a king. She is comparing two different things. It isn't an Allusion because that's a reference to something you make like a show, movie, ect. A Simile uses "Like" or "As" so that's not it. An Oxymoron is like a figure of speech.