Free jazz ensembles often omitted which instrument?

The group of artists called the Société Anonyme des Artistes Peintures, Sculptors, Graveurs, etc. is particularly significant for its role in _____________

A. promoting the work of women artists as equal to that of their male colleagues B. the rise of independent exhibitions and gallery system to promote a diverse range of art C. emphasizing the importance of art to represent the fleeting effects of light and color D. unifying the avant-garde artists in France

In the language of the Disco disc jockeys used the term ________ to refer to overlapping the ending and beginning of two recordings while keeping the drum beat constant.

Fill in the blank(s) with the appropriate word(s).