The correct answer is B) heightened domestic security measures to defend against terrorism.
The response to the threat of terrorism that has most directly impacted citizens in the United States is "heightened domestic security measures to defend against terrorism."
After the terrorist attacks of September 11, 2001, the Bush administration took many actions to fight terrorism and protect the United States. Specifically, one of the most important decisions the Bush administration made was the creation of the Department of Homeland Security. Its main objectives were the security of the nation, border security, cybersecurity, immigration, customs, and the prevention against terrorist attacks.
