Choose B (“All whales are mammals”), C (“All whales are aquatic animals”), and E (“Some aquatic animals are mammals”):
- From B and C, whales are both mammals and aquatic animals.
- This means at least some aquatic animals (whales) are mammals, which is exactly what E states.
Thus, B and C together logically imply E.
This set avoids unnecessary specific dietary statements like carnivores, which would introduce extra constraints not supported by the chain.