3.To What order do dolphins belong?
A. Carnivora
B. Sirenia
C. Cetacea
D. Pinnededia

Cetacean

Explanation:

Let us start with the family Delphinade which is the largest in the Cetacean order, and relatively recent: dolphins evolved about ten million years ago, during the Miocene. Dolphins are among the most intelligent animals and their often-friendly appearance and seemingly playful attitude have made them popular in past and current human culture.

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