Why did the United States go to war against Iraq in 2003?

A.

Al-Qaeda joined forces with Saddam Hussein.

B.

Iraq was believed to have weapons of mass destruction.

C.

Osama bin Laden was thought to be hiding in Iraq.

D.

The Taliban took over in Iraq after leaving Afghanistan.

B.

Explanation:

Their main reason to go to war in a strategically-led coalition was to disarm and neutralize Iraq's threat with the weapons they held. It can be said that A was also a reason that such happened, but the primary reason was because of Saddam Hussein's government that held such weapons which was deemed a threat to the entire world.