C. "She looked at him out of furious eyes..." (Paragraph 13).
Explanation:
As used in Paragraph 10, the word "petulantly" means "showing sudden irritation". As she looked at him out of furious eyes, it is clear that she was suddenly irritated by the invitation.
"Petulant" means a move with sudden irritation over trifling annoyance. It manifests in anger and irritation.
The rhetorical device used on that excerpt is metaphor, as one can see on the use of freedom on one side and chains of poverty on the other side. As well, there is a metaphorical treatment on the case of good words to good deeds.