challenge: What is the primary distinction between Dvaita Vedanta and Advaita Vedanta?
  
  A. Dvaita Vedanta posits a personal God, while Advaita Vedanta has a monistic view of the universe
  B. Dvaita Vedanta believes in multiple gods, while Advaita Vedanta believes in a single God
  C. Dvaita Vedanta sees the universe as an illusion, while Advaita Vedanta sees it as real
  D. Dvaita Vedanta rejects the existence of a personal God, while Advaita Vedanta accepts it
  Answer: 