Study the illustration above. It depicts vertebrates at different stages of embryological development. Some species are more closely related than others. Which arrangement of the different phyla places the embryos in an order based on relatedness from least to most complex?
A) fish, amphibian, reptile, bird, mammal
B) amphibian, reptile, mammal, bird, fish
C) fish, reptile, mammal, bird, amphibian
D) mammal, bird, reptile, amphibian, fish