Final answer:
Utilitarianism can coexist with the 'three R's' (replace, reduce, refine) approach, as it emphasizes balancing the welfare of animals against the benefits of research outcomes for the greatest number.
Step-by-step explanation:
Someone who accepts the "three R's" (replace, reduce, refine) in reforming medical research using animals might agree with Utilitarianism. The principle of Utilitarianism argues for actions that result in the greatest happiness for the greatest number. This view can align with the three R's, which aim to minimize animal use and suffering in research while striving for beneficial scientific outcomes. Refine suggests enhancing the way experiments are conducted to minimize pain and distress to the animals involved. Reduce implies fewer animals are used, and Replace encourages the adoption of alternatives to animal models. These principles can coexist with Utilitarianism, as they seek to balance the concerns for animal welfare with the potential benefits of research to society at large.