Answer:
Option 3: America has increased security measures and military involvement.
The 9/11 attacks had a profound impact on U.S. policy, leading to significant changes in security measures, including the creation of the Department of Homeland Security and the implementation of the USA PATRIOT Act. The United States also became involved in the War on Terror, with military operations in Afghanistan and Iraq, marking a shift toward increased military engagement in response to the attacks.
Step-by-step explanation: