Bernice is preparing a report on evidence for the common ancestry of species. She includes the figure of forelimbs shown.
The cladogram shows the common ancestry of frogs, alligators, chickens, and horses by comparing their forelimbs. The shared root is the lobe-finned fish.
The forelimbs are an example of which of the following?
A. analogous structures
B. vestigial structures
C. homologous structures
D. convergent structures