challenge: According to Tammuz's 1996 conclusion, where is Lagaba located in relation to the city of Babylon?
  
  A. 10 km South-south-west of Babylon, on the eastern bank of the Euphrates River
  B. 5 km West of Babylon, on the northern bank of the Tigris River
  C. 15 km North-north-east of Babylon, on the western bank of the Euphrates River
  D. 20 km East of Babylon, on the southern bank of the Shatt en-Nil canal
  Answer: 