Concerned by increased terrorist activities, which of the following methods are being practiced by U.S. law enforcement?

1. Investigating suspected terrorists
2. Preparing for and responding to specific terrorist acts
3. Preparing for possible terrorist acts involving weapons of mass destruction
4. All of the answers are correct.

U.S. law enforcement employs a comprehensive approach that includes investigating suspects, responding to and preparing for terrorist acts, and dealing with threats from weapons of mass destruction to combat increased terrorist activities. Therefore, the correct option is 4) All of the answers are correct.

Explanation:

In response to increased terrorist activities, the U.S. law enforcement agencies are actively engaging in several counterterrorism methods. These include investigating suspected terrorists, preparing for and responding to specific terrorist acts, and preparing for possible terrorist acts involving weapons of mass destruction.

After the events of September 11, 2001, the threat of terrorism led to a more pronounced focus on security measures both domestically and internationally. U.S. responses have included a range of actions, from legislative changes like the Patriot Act to intelligence operations aimed at disrupting terrorist networks and financial support systems. Additionally, efforts extend to deradicalization programs and attempts to interrupt the pathway to terrorism through education and the promotion of intercultural understanding. Overall, engagement in these measures reflects a comprehensive approach to countering the various facets of the terrorist threat.