Which of the following is not one of the key generalizations about the role of media in society that emerged from the limited-effects research work conducted between 1945 and 1960?

a. With the widespread practice of the social responsibility theory in Americanmedia, radio and television should no longer be regulated differently thannewspapers or magazines

b. By the time most people become adults, they have developed strongly heldgroup commitments such as political party and religious affiliations thatindividual media messages are powerless to overcome.
c. When media effects do occur, they will be modest and isolated. d. Media rarely directly influence individuals.

a