Statement: Aggressive animals can be trained—through care and affection—to behave as the occasion demands.\nConclusions:\nI) Trained dogs cannot be aggressive.\nII) Animals are always aggressive unless they receive care and affection.

Introduction / Context:
The statement claims that aggressive animals can be trained to behave appropriately with care and affection. It does not universalize aggression nor claim permanent removal of aggressive tendencies after training.

Given Data / Assumptions:

• Some animals are aggressive.
• Care and affection can be used to train them to behave as required.
• No claim is made about absolute elimination of aggression or about all animals being aggressive by default.

Concept / Approach:
Conclusion I overgeneralizes: training enabling appropriate behavior does not imply the impossibility of future aggression. Conclusion II overgeneralizes in the other direction: it asserts a universal baseline of aggression unless trained, which the statement does not state.

Step-by-Step Solution:
1) Parse the modality: “can be trained” indicates possibility, not necessity.2) Note scope: the statement refers to aggressive animals, not all animals.3) Reject absolute claims I and II as they exceed the premise.

Verification / Alternative check:
We can readily imagine trained animals occasionally reverting to aggression, and many animals not being aggressive at baseline—contradicting I and II respectively.

Why Other Options Are Wrong:
Any option accepting I or II imports certainty the statement does not provide.

Common Pitfalls:
Treating “can be trained” as “will always be non-aggressive henceforth,” or treating “aggressive animals” as “all animals.”

Final Answer:
Neither I nor II follows.