Self-censorship, a form of media control in the united states, led to the mpaa film classification system which was enacted around

1967-1968

Explanation:

The MPAA (Motion Picture Association of America) film classification system was enacted around 1967-1968 in order to rate the suitability of a film for certain audiences. This was a response to self-censorship and to the Motion Picture Production Code, which was in place before the system was introduced. However, the rating system is voluntary, and movies can chose not to have a rating.

the chair is the committee member from the majority party who has the most seniority. in the south carolina senate, the chair is the committee member from the majority party who has the most committee seniority.

answer; rational if melanie values sleep more highly than the benefits she expects to receive from attending the class;