Concept:The Code of Conduct Bureau is a body created to enforce ethical standards in public office.Explanation:The Bureau was established to ensure that public officers act with integrity, honesty, and transparency.It aims to promote high standards of public morality and accountability in the conduct of government business.This means checking unethical behaviour and making public officers answerable for their actions.Among the options, this is best captured by enhancing probity and accountability in public service.Answer:C. enhance probity and accountability in public service