What was the nickname for the whole popular song industry?

When an actor misses their entrance, the actors currently on stage shouldn't improvise until the other actor gets on stage because an actor should never deviate from the playwright's words

Indicate whether the statement is true or false

Which of the following provides a good summary of this composition?

a) it is strophic b) every verse or half verse is differentiated by a new musical idea c) every verse alternates new and repeated music d) the upper voices are improvised in performance and are based on the basso continuo