Some of my friends are interested in science, but none of them can tell ____________.

A．when UFOs appear next time

B．if horses know the way or not

C．where was this kind of plant found

D．how elephants communicate

以( )为主线，按企业信息化的先进思想整合工程咨询业流程。

A．工程咨询业务员

B．工程咨询业主

C．工程咨询项目

D．工程咨询公司