The best answer is C. physician's pledge to care for patients.
Hippocrates was a Greek practitioner of medicine, known by many today as the "Father of Modern Medicine" and established the Hippocratic oath which is still used today and required doctors to uphold ethics when caring for their patients. His philosophy of medicine, which includes the idea of doing no harm to a patient is a foundation for western medicine today.
Hitler killed 60-85 million people , while Stalin killed 10-20 million people.
A democracy and a monarchy are very different in terms of the rights and responsibilities of citizens, since in a democracy the citizens have the right to overthrow or remove their elected officials, where as in a monarchy they have no choice over who rules them. Citizens therefore have less political responsibility in a monarchy, however.
