Why were staff lines an important improvement to musical notation?

What section of a jazz band is made up of piano, bass, and drums? a - melodic section b - brass section c - secondary section d - rhythm section

Acurator decides to display an eighteenth-century painting in a windowless room with controlled temperature and humidity. pick the answer that best describes the reasons for her choice: (1 point) 1)the curator wants to make sure that the temperature and humidity are comfortable for visitors. 2)keeping the temperature and humidity at a set level will save money. 3)the ultraviolet rays will damage the painting by fading and flaking the paint. 4)ultraviolet rays will fade the paint pigment and high temperature and humidity will damage the paint.

The "neo-impressionists." as they were called at the time, believed that is the proper subject for their painting