Answer:
The correct answer is 3. The war in Iraq costed the United States about $800 billion.
Step-by-step explanation:
The war in Iraq was a conflict that began on Thursday, March 20, 2003 and ended on Sunday, December 18, 2011. After the war ended, a training operation for Iraqi troops to fight insurgency and terrorism was launched.
The financial cost of the war has been estimated at more than 845 billion dollars to the United States.