A Kantian would argue that the morally right thing to do in this case would be to refrain from operating, thereby not sacrificing Mary to save Jodie. Kantians base their moral philosophy on the principles of goodwill, duty, impartiality, and reciprocity, which are all grounded in the concept of the categorical imperative. 1. Goodwill and Duty: For Kantians, the highest moral good is to act out of a sense of duty and goodwill, rather than for the consequences of the action. In this case, the duty would be to respect the inherent value of each life. Since both Jodie and Mary are individuals with intrinsic worth, it would be wrong to intentionally end Mary's life, even if it means saving Jodie.2. Impartiality and Reciprocity: Kantians emphasize treating all individuals as ends in themselves and never merely as means to an end. This principle of impartiality means that one should not favor one life over another. By choosing to operate and save Jodie at the cost of Mary's life, one would be using Mary merely as a means to save Jodie, which is morally impermissible from a Kantian perspective.3. Categorical Imperative: The categorical imperative requires that one acts only according to maxims that can be universally applied. If the maxim "It is permissible to sacrifice one life to save another" were universalized, it would lead to a world where lives could be arbitrarily sacrificed for the greater good, which contradicts the Kantian respect for individual autonomy and dignity.In conclusion, a Kantian would likely argue that the parents should have decided to not allow the operation, as they must respect the intrinsic worth and autonomy of both Jodie and Mary, regardless of the tragic consequences