challenge: What is the etymology of the term 'dar be-mehr' in the context of a Zoroastrian fire temple?
  
  A. It is a throwback to the age of the shrine cults, related to Mithra's protection
  B. It refers to the sacred fire itself
  C. It is derived from the name of a Zoroastrian prophet
  D. It describes a specific architectural feature of the temple
  Answer: 