Which piece of evidence supports the hypothesis shown in the "Within the artiodactyls" origin of the whale lineage, suggesting that the whale lineage diverged from the lineage leading to the hippos after the other members of the order Artiodactyla (pigs, camels, etc.) diverged?
A) A phylogeny of fossil cetaceans indicates that a gradual transition occurred between terrestrial forms and aquatic, whale-like forms.
B) DNA comparisons show that whales and hippos share more genetic sequences than whales share with other artiodactyls.
C) Some modern cetaceans have a vestigial pelvic girdle.
D) Whales arose from a terrestrial ancestor about 50 million years ago.
E) All artiodactyls other than whales share an unusual ankle bone called the astragalus.
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