AP interviews Lawrence Wilkerson

Here.

[F]ormer Powell chief of staff Lawrence Wilkerson also said President Bush was "too aloof, too distant from the details" of postwar planning. Underlings exploited Bush's detachment and made poor decisions, Wilkerson said.
Wilkerson blamed Vice President Dick Cheney, Secretary of Defense Donald Rumsfeld and like-minded aides. He said Cheney must have sincerely believed that Iraq could be a spawning ground for new terror assaults, because "otherwise I have to declare him a moron, an idiot or a nefarious bastard."

The answer is C.