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.
Elections
The fact that leaders get to contest in an election to win the mandate of the people so that they can lead ensures that they are responsive to their wishes. This is because voters will naturally elect people that are sympathetic to their issues
The major principle protect your right to be protected by law. For example, no one can assault you and get away.
Euclid's Elements. It consists of 13 books. It was written in 300 BC.
