Today's business people live in an over communicated world. There are too many Web sites, too many reports, too many bits of information 　1　for their attention. The successful ones are forced to become deft machete wielders in this jungle to 　2　. They ruthlessly cut 　3　all the extraneous data that are encroaching them. They 　4　through their tasks so they can cover as mush 　5　as possible answering dozens of e-mails at a sitting and scrolling past dozens more. 　6　the main scarcity in their life is not money, it's time. They guard every 　7　second the way a desert wanderer 　8　his water.
　　The problem 　9　all this speed and the frantic energy that is spent using time efficiently is that it 　10　creativity. After all creativity that 　11　while you're doing some-thing else:
　　When you're in the shower your brain has time to noodle about and 　12　the odd connections that lead to new ideas. But if your brain is always multitasking, or responding to techno prompts, there is on time or energy for undirected 　13　play Furthermore if you are consumed by the same information loop 　14　around everyone else you don't have anything to stimulate you 　15　thinking differently. You don't have time to read the history book or the science book that may actually 　16　you to see your own business in a new 　17　. You don't have access to unexpected knowledge. You're just 　18　along in the same narrow current as everyone else which is swift but not deep.
　　A placebo machine—a little gadget with voice 　19　and everything will help Wireless people to log 　20　and it will tell them they have no messages. They'll be able to experience life instead of information. They'll be able to reflect instead of react
______

A.psychological

B.physical

C.mental

D.spiritual