RingCentral , Inc. (NYSE:RNG), a leading provider of cloud business communication solutions, today announced that Gartner has recognized RingCentral as a leader in the Magic Quadrant for Unified Communications as a Service (UCaaS) Worldwide published on September 3, 2015.
Take context from the input text and decide on the accurate relationship between 'Magic Quadrant' and 'Gartner' from the options provided.
Options: original broadcaster, creator, operator, headquarters location