Anyone good at math I need help I will give you $10 for each test you tare for me in my mahlab

If you look at it and remember stuff from you’re class the answer should be d

Iwould say d) signed unknown street singers who brought original songs to record.

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.

Answerwashes;