Final answer:
The USA Patriot Act greatly expanded the government's authority to monitor e-mails and website visits.
Step-by-step explanation:
The answer to your question is c. USA Patriot Act. The USA Patriot Act, officially known as the Uniting and Strengthening America by Providing Appropriate Tools Required to Intercept and Obstruct Terrorism Act of 2001, greatly expanded the authority of the government to monitor e-mails and website visits. It was a response to the threat of terrorism after the 9/11 attacks. The act permitted the use of covert surveillance against individuals suspected of having connections to terrorist plots or networks.