Answer: C. A reference group
Explanation: I believe this is the answer because Kelly's actions and attitudes are based off of what statements her favorite celebrities have made , and a reference group are a group of people like celebrities or heroes ( these are the most common ) that you try to be like, support, care for, or reference you self too. And in this case Kelly buys shoes and jeans that her favorite celebrities wear or like , along with supporting charities. This is because she wants to be like them.