What is the name given to philosophers who attempt to use only one ethical approach to ethical questions? A

The correct answer is D deontologists.

deontologists philosophers provide a verdict on whether an action is bad or good depending on society's set rules. Moreover, various activities that obey those regulations and laws are considered as ethical, while those that defile them are labeled as unethical. Multiple types of deontologists' philosophers include imperfect and perfect duties. Perfect duties are inflexible, i.e., you should not kill, while imperfect duties due are flexible, i.e., you should learn your surroundings.