Multiple Choice
Given the phylogeny of extant and extinct cetaceans below, which of the following conclusions is correct? 
A) The hippopotamus belongs to the cetacean group.
B) The traits present in modern cetaceans appeared quickly and de novo.
C) All living cetaceans have completely lost their hind feet.
D) The hippopotamus belongs to the cetacean group and all living cetaceans have completely lost their hind feet.
E) None of the given choices are correct.
Correct Answer:
Verified
Correct Answer:
Verified
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