Aside from Reasons of Self-Defense, What Was the Other Rationale

Aside from reasons of self-defense, what was the other rationale that the United States and Great Britain used to support their case for the invasion of Iraq in 2003?

A) That Saddam Hussein had weapons of mass destruction and that this was a threat to the world
B) That Saddam Hussein was a bloody tyrant who had killed thousands of his own people
C) That Saddam Hussein had ignored earlier Security Council resolutions
D) That they needed to gain access to important security clearances