|Question 17Verbal

Source Texts

Text
In the book A Theory of Harmony (1985), Swiss musicologist Ernst Levy argued that every chord has an opposite that can be substituted for it. For example, a pianist could replace the vi chord for the bIII chord while ________ chord is a given chord's opposite can be determined using a music visualization tool called the circle of fifths.
Which choice completes the text so that it conforms to the conventions of Standard English?
improvising which
A
improvising. Which
B
improvising and which
C
improvising, which
D