B. would seem to be the correct one. A. isn't true because dolphin groups are called pods. C. would not be true except for a small group of lions that live near the Nile. The females usually do the hunting.
The most accurate statement about social mammals is that adults in a herd protect their young from predators. While the other statements about zebras and pride hunting contain some inaccuracies, statement B stands out as correct. Therefore, option D suggests all statements are accurate, but that's debatable and could mislead interpretation.
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