阅读短文，从每小题所给的四个选项中，选出正确的选项。D
Few others know more personal information about people than the smart phones in their pockets: phone numbers, location(位置), even the owner's real name and a unique(唯一的) ID number that can never be changed or turned off.
These phones don't keep secrets. They are sharing this personal information widely and secretly, a Wall Street Journal survey has found. An examination of 101 popular smart phones "apps" games and other software(软件) showed that 56 sent the phone's unique ID to other companies without users' awareness or agreement. Five sent age, nationalities and other personal information to outsiders.
The findings discover the effort by those app companies to collect personal information in order to get sponsorship (赞助) for which are largely traded. The Pandora, a music app, sends age, location and other information to different ad companies. A game called Paper Toss, in which players try to throw paper into a trash can, also sends the phone's ID number to at least five ad companies. Omegle, an iphone app for meeting strangers around for the purpose to make friends, does the same thing. For these companies, personal information weighs much more than apps themselves.
"In the world of mobile, there is no secret" says Michael Becker of the Mobile Marketing Association. A mobile phone is "always with us. It's always on". Mobile phone company says it reviews each app before offering it to users. Both Apple and Google say they protect users by requiring apps to ask users for agreement before providing kinds of information, such as location. "We have created strong protections for our customers, especially location-based information." says one mobile phone company. "Trust is badly important.
