Which federal law enforcement agencies derive their authority from the constitutional power of taxation?

The problem of experimenter reactivity in correlational research may be solved by

A) Performing no manipulations. B) Holding an extraneous variable constant. C) Using two independent experimenters, one to measure each variable. D) Using involuntary participants.

________ are companies which control media in different cities under a single owner

a. Conglomerates b. Censorship units c. Lobbies d. Affiliates e. Caucuses