Final answer:
Electronic surveillance in the United States is regulated by the U.S. Constitution, federal law, and state statutes. Option d is correct.
Step-by-step explanation:
Electronic surveillance in the United States is regulated by multiple sources of law, which include: the U.S. Constitution, particularly through the Fourth Amendment that provides the right to be free from unreasonable searches and seizures; federal law, such as the Electronic Communications Privacy Act (ECPA) and the Foreign Intelligence Surveillance Act (FISA); and state statutes, where each state can have its own surveillance laws and regulations.
Therefore, electronic surveillance is regulated by d) all of these.