Final answer:
Government surveillance is allowed under the USA Patriot Act, which was passed after the 9/11 attacks in 2001 Therefore, the correct option is A. USA Patriot Act.
Step-by-step explanation:
Government surveillance is allowed under the A. USA Patriot Act. Passed after the 9/11 attacks in 2001, the USA Patriot Act gave the federal government increased powers to seek and obtain search warrants, including bypassing warrant requirements in certain cases.
However, there has been debate and controversy surrounding the use of the Patriot Act for purposes other than counterterrorism, such as prosecuting drug dealers.