In April of 2003 Skype.com was registered by entrepreneurs Niklaus Zenstrom and Janus Friis of Luxembourg (who have since launched Kazaa and Joost).

Thirty months later Skype was acquired by eBay for about 3 large (after cash, stock and earn-out) and while a lot of "grown-ups" can't tell you what it is they do, amazingly every 20-year-old on the planet can.

All other internet phones utilize a client/server configuration to centralize traffic, but only Skype uses peer-to-peer technology to distribute it -- so C is correct.






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