Evonka is listening to music from an online music provider (such as Pandora or Jango). She builds a list of music prefer

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Evonka is listening to music from an online music provider (such as Pandora or Jango). She builds a list of music preferences, including favorite songs. The music service then suggests additional songs she might enjoy. The music provider is an example of a cloud-computing application that uses a technology for collaborative filtering, which helps define the list of songs available to listeners. Which term describes this technology?

A. Bit-torrent r
B. Crowdsourcing
C. Grid computing
D. Software as a Service