问题如下：
Grace, CFA, Level III CFA exam's proctor. Before administrating the exam, Grace sent some exam questions to two of her friends by mail, Alice and Doris, who would attend the Level III exam. This was a plan that these three people had worked out a few months ago. Alice decided to use the known exam questions to prepare for her upcoming exam. Doris considered for a while and deleted the email without looking at the exam questions. Regarding this case, which of the following statements according to the Code and Standards?
选项：
A.Only Alice violated CFA Institute Code and Standards.
B.Only Grace violated CFA Institute Code and Standards.
C.All of them violated CFA Institute Code and Standards.
解释：
C is correct.
According to the Standard VII(A) Conduct as Participants in CFA Institute Programs, there was no doubt that Grace, as an exam proctor, violated the security of the exam. Alice used the known exam questions to prepare for her exam which was also a violation. Although Doris deleted the email without looking at the exam questions, she was involved in the plan to violate the integrity of the CFA Institute programs.
Proctor是指考官吗？如果给的题不是真题而是他自己预测的题，有没有违反呢
