Alex is directing an episode of a fictional television series. What should he do first in the preproduction stage of his project?
A. conduct a script reading
B. visualize the episode’s story
C. analyze the script for all the episodes
D. hold rehearsals of actors

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.

Because of its aerodynamic shape

Comma should appear after  the quote, 

Emotional appeal, plain folks, and bandwagon