问题如下：
Which of following responses regarding effective performance attribution is correct?
Response 1: Performance attribution draws conclusions regarding the quality of a portfolio manager’s investment decisions.
Response 2: Performance attribution should help explain how performance
was achieved by breaking apart the return or risk into different
explanatory components.
选项：
A.Only Response 1
B.Only Response 2
C.Both Response 1 and Response 2
解释：
B is correct.
Performance attribution helps explain how performance was achieved; it breaks apart the return or risk into different explanatory components. Effective performance attribution must account for all of the portfolio’s return or risk exposure, reflect the investment decision-making process, quantify the active decisions of the portfolio manager, and provide a complete understanding of the excess return/risk of the portfolio.
为什么C不对？ 看解析，感觉像是1 & 2 的结合呀
