Final answer:
Radio, TV, and movies contributed to the success of Rock 'n' Roll by promoting the genre, providing a platform for artists, and enhancing its appeal.
Step-by-step explanation:
Rock 'n' Roll achieved success through radio, TV, and movies by:
- Promoting the genre to a wider audience, exposing more people to Rock 'n' Roll music
- Providing a platform for Rock 'n' Roll artists to perform and showcase their talent
- Creating a visual and auditory experience that enhanced the appeal of Rock 'n' Roll
All of these factors contributed to the success of Rock 'n' Roll and helped blur racial lines, bringing people together and breaking down barriers of prejudice.