利用（）可以获取某FTP服务器中是否存在可写目录的信息。

A．防火墙系统

B．漏洞扫描系统

C．入侵检测系统

D．病毒防御系统

Bill Valley has been working for Advisors, Inc. for several years, and he just joined CFA Institute. Valley’s sister just received a large bonus in the form of stock options in Zephyr Inc, Valley’s sister knows nothing about financial assets and offers Valley a week at her holiday home each year in exchange for Valley monitoring Zephyr and the value of her stock options. In order to comply with the Code and Standards, Valley needs to inform Advisors of:()

A. the compensation in the form of the use of the holiday home only.

B. the fact his sister owns the options on Zephyr stock only.

C. both the use of the holiday home and his sister’s options.