I would say understatement, i guess it could be sarcastic, but I've never learned sarcasm as figuritive language, if it was my question I would say understatement.
Answer:
Are there any listed answers they give you?
If so, can you list them for us?
Answer:
The theme of the short story is power
Explanation:
Waverly struggles to gain control and independence from her domineering mother.
The answer for that question is C