—Could you please tell me       ?

—Sorry, you can turn to Mr. Lee for help.

A．how long can man live without water

B．whether Yao Ming would play for Rockets or not

C．how I can keep myself safe from the flu

D．why did a serious landslide happen in Zhouqu, Gansu Province 

动态信用度等级的更新时间及执行时间是哪天？