https://media.hhmi.org/biointeractive/click/finch/?_ga=2.112065921.441435820.1537894985-292177868.1531329255
Which of the following is not a way you were asked to sort these finches.

Select one:

a.
appearance


b.
All of these were used in this module


c.
DNA


d.
beak shape

e.
song


f.

spectrogram