听力原文：More than 10 months after the end of major military operations in Iraq, American teams have still not found conclusive evidence that Iraq had any chemical, biological or nuclear weapons, raising doubts about one of the Bush administration's main arguments for going to war. Since he resigned from his post last month, Dr. Kay has said he believes that Iraq largely abandoned the production of weapons of mass destruction after the first Gulf War, and that it gradually destroyed its remaining, stockpiles during the 1990's.
What does Dr. Kay believe？
A．The Bush administration is justified to launch military operations in Iraq.
B．Iraq's weapons of mass destruction have not been found yet.
C．Iraq's weapons of mass destruction were destroyed during the Gulf War.
D．Iraq destroyed all its weapons of mass destruction in the 1990's.