challenge: What was the time frame during which Al-Qaeda in Iraq (AQI) was part of the Mujahideen Shura Council (MSC)?
  
  A. 15 January 2006 to 15 October 2006
  B. 1 October 2006 to 31 December 2006
  C. 1 January 2005 to 31 December 2005
  D. 15 October 2005 to 15 January 2007
  Answer: 