In which of the following scenarios would selective visibility be important? A musical number in which all actors are on stage
Obscuring a mysterious figure on the edges of the stage
After the stage curtain has fallen
Recreating a sunrise

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.

The answer is going to be triad. hope that