问题如下：
Ivey Gubler, a performance researcher in CoCo company. Recently, he is asked by the employer to calculate the last five years' performance of the company. During the calculation, he just chooses some accounts which perform better, and excludes the terminated accounts from past performance history. Which of the following statements is most likely correct?
选项：
A.Ivey violates the standards by choosing some accounts which perform better.
B.Ivey violates the standards by excluding the terminated accounts from past performance history.
C.Both of these two actions above violate the standards.
解释：
C is correct.
According to Standard III(D) Performance Presentation, Ivey cannot only choose some accounts which perform better and shouldn't exclude the terminated accounts from past performance history. These two actions both violate this standard.
老师，A和B不是都违反了吗？难道只报道好的业绩就对？没有违反cfa准册？
