The core concept of this question revolves around understanding the principle of double effect in medical ethics, which justifies actions that have both good and bad effects, provided the intention is solely to achieve the good effect. The correct answer is B, as it directly addresses the ethical justification of actions with dual effects. Option A is incorrect because it focuses on the legality rather than the ethical justification. Option C is unrelated to the principle of double effect, and Option D, while related to medical practice, does not specifically address the ethical justification of actions with dual effects.