challenge: Where is the Mausoleum of Kumayl ibn Ziyad located?
  
  A. Adjacent to the Al-Hannanah Mosque in Basra, Iraq
  B. In the city center of Baghdad, Iraq
  C. Near the ancient city of Babylon, Iraq
  D. Adjacent to the Al-Hannanah Mosque in Najaf and Kufa, Iraq
  Answer: 