The correct answer is A) Iraq denounced the events and disassociated itself from Al-Qaeda.
The statement that was not a response to the September 11 terrorist attacks on the United States was "Iraq denounced the events and disassociated itself from Al-Qaeda."
All of the other statements were true.
After the Terrorist Attacks of September 11, US President George W. Bush ordered the creation of the Homeland Security Department. Among its many functions and responsibilities, the US Homeland security department that was created in November 2002, oversees border security, the prevention of terrorist attacks, cybersecurity, immigration and customs, and the prevention and operation during disasters.