See tyhe table below 1 what is the nature of folk song

It has become clear, however, that folk songs and other pieces are the result of ... The form of a folk song as heard at any one time, however, is likely to have been very ... See mode: Plainchant for a more complete description of the modes

the correct answer is:   [c]:

                    →     " leave it out. "  

hope this is to you!

        best wishes!

the anwser is b because his violence took on the form