A. Foreign Intelligence Surveillance Act (FISA) of 1978
Step-by-step explanation:
The USA Patriot Act of 2001 was made to ensure previous laws and make it easier for the government to find and hunt terrorism. This was set in motion after 9/11 to stop further terrorist agenda. A big law that was strengthened by this was the Foreign Intelligence Surveillance Act (FISA) of 1978. The point of FISA was so the government had the means to electronically or physically search individuals who they thought were engaging or were going to engage in terrorist acts. FISA ensured government officials that they could take extra steps to finding terrorists, like searching different business records and surveillance with cameras, which some may argue is unconstitutional.