When a cellular telephone user places a call, the carrier transmits the caller’s voice as well as the voice of the person who is called. the encoded voices are the data of the call. in addition to transmitting the data, the carrier also stores metadata. the metadata of the call include information such as the time the call is placed and the phone numbers of both participants. for which of the following goals would it be more useful to computationally analyze the metadata instead of the data?
i. to determine if a caller frequently uses a specific wordii.
ii. to estimate the number of phone calls places next monday between 10: 30 am and noon
iii. to generate a list of criminal suspects when given the telephone number of a known criminal
a. i only
b. ii only
c. ii and iii only
d. i, ii, and iii

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a  social news website  is an  internet  website  that features  user-posted stories. such stories are ranked based on popularity, as voted on by other users of the site or by website administrators. users typically comment online on the news posts and these comments may also be ranked in popularity. since their emergence with the birth of  web 2.0, social news sites have been used to link many types of information, including news, humor, support, and discussion. all such websites allow the users to submit content and each site differs in how the content is moderated. on the  slashdot  and  fark  websites,  administrators  decide which articles are selected for the front page. on  reddit  and  digg, the articles that get the most votes from the community of users will make it to the front page. many social news websites also feature an online comment system, where users discuss the issues raised in an article. some of these sites have also applied their voting system to the comments, so that the most popular comments are displayed first. some social news websites also have a  social networking  function, in that users can set up a user profile and follow other users' online activity on the website.