[单项选择]If there is one thing that could halt the ascent of social networks, it is the thorny question of privacy. This is (62) because it goes right to the heart of the social-networking business model, In order to (63) users, sites need to offer ways for members to restrict the information about themselves that gets shared with a wider (64) . But if a site allows members to keep too much of their information private, there will be less traffic that can be turned into profit (65) advertising and various other means, (66) the network’s business will suffer.
There is some evidence that people are starting to become more sophisticated about the Way in which they (67) their data, which could have longer-term (68) for the networks’ growth, Research (69) last year showed that some 60% of adults are restricting (70) to their online profiles.A. remedied B. transformed
C. adapted D. adjusted

If there is one thing that could halt the ascent of social networks, it is the thorny question of privacy. This is (1) because it goes right to the (2) of the social-networking business model. In order to attract users, sites need to offer ways for members to restrict the information about themselves that gets shared with a wider (3) . But if a site allows members to keep too much of their information privacy, there will be less (4) that can be turned into profit through advertising and various other means, so the network’s business will (5) .
There is some evidence that people are starting to become more (6) about the way in which they (7) their data, which could have longer-term (8) for the networks’ growth. Research published last year showed that some 60% of adults are restricting (9) to their online profiles.
(10) , the social networks have partly brought this on
A. compulsory
B. controversial
C. comprehensive
D. conventional