【正确答案】 B

【答案解析】[听力原文]
   W: I've called this special meeting to talk about corporate spying. Corporate spying is a growing problem these days, and we need to take steps to ensure that our company's information is protected. Now, corporate spies can be anywhere—inside or outside the company—looking in our computers, stealing sensitive equipment, even sorting through the trash in our dumpsters. So the following policies are now in effect: Every computer will be assigned a new password, and this password will be changed every other week. Also, any documents and papers must be shredded. Do not throw away any document in the trash, not even a hand-written note. Please put all papers in the special recycle bin. They will be collected at the end of each day for shredding. Finally, I ask you to be vigilant of anyone on the floor whom you don't know. All visitors will be required to be accompanied by an employee. If you see someone, even a repair person, who is not being accompanied, please approach them and inquire who they are looking for.
选项A错误，这段讲话是关于防止商业间谍的措施。选项B正确。选项C是防止泄密的一条具体要求，不是主题。选项D与讲话无关。