Self-driving vehicles threaten to send truck drivers to the unemployment office. Computerprograms can now write journalistic accounts of sporting events and stock price movements. Thereare even computers that can grade essay exams with reasonable accuracy, which could revolutionizemy own job. Increasingly, machines are providing not only the brawn but the brains, too. And thatraises the question of where humans fit into this picture--who will prosper and who won′t in thisnew kind of machine economy
Within five years we are likely to have the world′s best education, or close to it, online andfree. But not everyone will sit down and go through the material without a professor pushing them todo the work.
Your Smartphone will record data on your life and, when asked, will tell you what to do,drawing on data from your home or from your spouse and friends if need be. "You′ ve thrown outthat bread the last three times you′ve bought it, give it a pass" will be a text message of the future.
How about"Now is not the time to start another argument with your wife" The GPS is just thebeginning of computer-guided instruction. Take your Smartphone on a date, and it might vibrate inyour pocket to indicate "Kiss her now." If you hesitate for fear of being seen as pushy, it may write:
"Who cares if you look bad You are sampling optimally in the quest for a lifetime companion."
A lot of jobs will consist of making people feel either very good or very bad about themselves.
Coaches, mentors and disciplinarians will spread to many areas of life, at least for those of us whocan stand to listen to them. These people will cajole us, flatter us and shame us into improving ourlives, our work habits and our consumption.
Computing and software will make it easier to measure performance and productivity.
It will be harder to gloss over our failings and maintain self-deception. In essence everyone willsuffer the fate of professional chess players, who will always know when they have lost a game, havean exact numerical rating for their overall performance, and find excuses for failure hard to come by.
Individuals will have many measures of their proficiency. They will have an incentive todisclose that information to get the better job or social opportunity. 
You′ll assume the worst aboutthose who keep secrets, and so openness will reign. Many of us will start to hate the idea of BigData.
Which of the following is closest in meaning to the underlined word"brawn" inParagraph 1
C.Physical strength.
D.Mental agility.


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