A feeling of physical pleasure is brought about by an increase in the availability of _____ in the _____

The current rating system for CD and music download lyrics was instituted:

A) decades before people became concerned about links between listening to music and suicide attempts. B) shortly before people became concerned about links between listening to music and suicide attempts. C) coincidentally at about the same time people became concerned about links between listening to music and suicide attempts. D) in part to address people's concerns about links between listening to music and suicide attempts.

Each of the following is identified by the communication model of persuasion as a key element in changing people's behaviors EXCEPT __________

a. characteristics of the audience b. the medium of communication c. the context d. the source