Manatees, colloquially referred to as "sea cows" are herbivorous, fully aquatic marine mammals. Unlike other marine mammals, they are closely related to elephants, making manatees more distantly related to other marine mammals. Over time, however, manatees have developed numerous anatomical features that are present in all semi or fully aquatic animals, such as whales and seals.
23) Development over time allows different animals to share common features.
A.) Conclusion follows beyond a reasonable doubt
B.) Conclusion does not follow beyond a reasonable doubt