Explain how natural law theory could be applied to the following scenario to det

Explain how natural law theory could be applied to the following scenario to determine the proper course of action.
A scientist is conducting an experiment using 100 adult subjects, hoping to finally discover a cure for liver cancer. Conducting this one last study can cure the disease and save the lives of countless people. But, the experiment causes long-lasting, horrible pain in the subjects, and they will not be able to benefit in any way from the study’s success. The researcher would ordinarily never be able to enlist any subjects for the study because of these two facts, so to ensure the cooperation of the subjects, he lies to them: he says that being a part of the study will be painless and that it will increase their lifespan. The study is completed, the cure is found, and the subjects spend the next year in agony. What would natural law theory say about the scientist’s actions?
Response should be 100-200 words in length, reflecting on the prompt above