How do i know wut level i am on here on ...jus wondering

When writing a puppet script, you should not a. props b. scenery c. puppets d. costumes

Changes in musical style from one historical period to the next are usually

Hurrywhat best describes an a. instruments that produce a sound through vibrating column of air, including the woodwind and brass family.b. simple, solid instruments that produce sound by being struck, scraped, or shakenc. instruments that produce sound by striking or rubbing a skin or membrane stretched across a resonating air chamberd. instruments that produce sound when a string or chord is struck, rubbed, or plucked