Observing participants' behavior as it occurs, with no intrusion by the researcher, is called _________ observation

?A single corporation can offer television, phone, and Internet services due to

A. ?a key merger between a phone and cable company in the early 2000s. B. ?the Supreme Court supporting companies' right to make a profit by offering multiple products. C. ?the Telecommunications Act of 2001. D. ?the Telecommunications Act of 1996. E. ?None of these choices is true.

Under the decision in Katz v. United States, law enforcement must not only obtain a warrant to conduct a search; they must also prove ______.

a. probable cause b. chain of custody c. mens rea d. corpus delecti