The Hays Code,which Required Higher Moral Standards for Subject Matter

The Hays Code,which required higher moral standards for subject matter in films,was ultimately accepted by Hollywood studios when

A) Bank of America founder and Hollywood investor A.H.Giannini joined the campaign.
B) Protestant clergy threatened a boycott.
C) revenues from movies containing nudity and cursing began to decline.
D) publishers decided to abide by the code for their printed materials.