To search for any information needed on tomorrows Web, one only has to______.A．go through

To search for any information needed on tomorrows Web, one only has to______.

A．go through screen after screen of irrelevant data

B．ask the Web to dispatch some messenger to his door

C．use smart software programs called "agents"

D．explore Web sites by the thousands and pick out what"s relevant

请帮忙给出正确答案和分析，谢谢！