Answer:
C.
Explanation:
The answer is C because it uses the most formal language. It doesn't use language like 'best thing ever' or conversation talk. C uses words like 'welcomed', thus creating a formal tone.
My ideas:
Well, if she is spoiled, perhaps she can have expensive clothes? Something unnecessary, let's say one of those very expensive bags
How about a piercing that would not be normally allowed for teenage girls, but she can have since she gets way with it (eyebrow?)