Specific sound devices is not a criteria of sonnet.
I think it is D. Too much credit use I might be wrong but im pretty sure its D.
The Rocking Horse Winner and The Monkey's Paw be seen as ironic.
I need to know what argument you are talking you are talking about to answer the question.
Hey there! I'm happy to help!
A round character is one that we have a lot of detail on. A flat character is one that we do not know much about (things like backstory, feelings, etc.)
Usually the round character is the main character. Out of these answer options, Camilla looks like the main character because stories usually aren't focused on villains (B and D) and Cecilia seems like more of a side character, so I believe Camilla is the main character.
She also seems the most round because it says that she is from Gaul and she wants to make a new life in Rome. We already have much more backstory to her than the others, so the the round character is A. Camilla, the stranger from Gaul who is trying to make a new life in Rome.
Have a wonderful day! :D