[Solved] A significant development in the twentieth century that has changed the relationship between sex-as-reproduction to sex-as-pleasure is A)the recognition of sexual identity. B)the modern methods of contraception. C)the modern media. D)the introduction of pornography. Trademark: A symbol, word, or phrase legally registered or established by use as representing a company or product. Registration: The act of recording or enrolling details or documents formally with an official body or registry. Protection Period: A specified time frame during which certain rights or privileges are ensured or enforced. Distinctive Design: A unique and recognizable aesthetic feature or set of features of a product or entity that sets it apart from others.