Mark is the administrator of a drug-abuse treatment center in Chicago. He often needs to decide between allocating limited medical resources for various competing requirements. When caught between competing moral principles, Mark uses the following method: He groups ethical principles into two clusters: those which are duty-cased, and those which are consequence-maximizing, and compares the principles in each cluster against one another. He further prioritizes the duty-based principles above the consequence-maximizing cluster. Which of the following approaches to conflict resolution is exemplified here? Group of answer choices lexically ordering principles prima facie theory combining ranking and balancing single principle theories deontological theory