The use of a steadily treading bass line in Bach's Cantata No. 140 is called Walking bass.
What is the Walking bass technique?
It refers to maintaining a steady bass rhythm by walking between chords to develop a treading bass line.
This technique allows for the provision of a driving energy in musical pieces which is why it is most often seen in swing style music such as jazz and the blues.
In conclusion, option C is correct.
Find out more on jazz rhythm at https://brainly.com/question/8687307.
