The organization that claimed to be behind the 9/11 terrorist attacks was Al-Qaeda. What effect did this have on the U.S. response to 9/11?

AIt caused the U.S. to invade Iraq within months of the attack.

BIt caused the U.S. to invade Afghanistan within months of the attack.

CIt caused the U.S. to invade Pakistan within months of the attack.

DIt caused the U.S. to invade Iran within months of the attack.