Which option correctly uses commas to set off a nonrestrictive clause? A. Some scientists believe the island of Santorini, which is. Near Greece, is the basis for the ancient legend of Atlantis. B. Some scientists believe the island of Santorini which is near Greece is the basis for, the ancient legend of, Atlantis. C. Some scientists believe the island of, Santorini, which is near Greece is the basis for the ancient legend of Atlantis. D. Some scientists believe the island of Santorini which is near Greece, is the basis for the ancient legend of Atlantis.

 This would be the answer.

Explanation:

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Normally it is at the top left, above where the music starts.

The gregorian chant was a major cultural milestone in the middle ages. it was one of the first codified forms of music meant to be played as written, where previously it was difficult to mass-produce and disseminate any music. what's more, these chants were also some of the first examples of musical notation: the notes and bars of today's music sheets are a reflection of centuries of evolution beginning with these chants. it became official throughout the entirety of the catholic church, meaning that nearly all of europe followed this musical notation and styling.