Which of the following refers to a brief pause in a band's playing to feature a soloist or soloists; where the beat continues, but is implied not stated

Bach's unfinished collection of fugues and canons all based on a single theme of his own making is known as:

A) The Well-Tempered Clavier B) The Goldberg Variations C) The Musical Offering D) The Art of Fugue

Fra Angelico's Annunciation was made for the _____ of San Marco in Florence

a. Dominican monastery b. Palazzo della Signoria c. baptistery d. Piazza del Santo