the principle

The principle in general can be understood by trying to map out the logic of the argument. Conclusion: Entity 1 should not be required to ameliorate harmful thing X. Justification: Harmful thing X is actually the responsibility of a different entity 2. Answer B is correct because it conforms to that principle. Conclusion: Entity 1 (parents) should not be required to ameliorate harmful thing X (offenses of their children.) Justification: Harmful thing X (offenses of the children) are actually the responsibility of a different entity 2 (the children). I hope that helps! Please let us know if you have further questions.