Final answer:
Black musicians were the original creators of rock 'n' roll, with white musicians like Elvis Presley later popularizing the genre and thereby blurring racial lines and challenging societal norms.
Step-by-step explanation:
Black musicians were the pioneers of rock 'n' roll, utilizing their interesting blend of amplifiers, electronics, and traditional rhythm and blues to create this exciting new genre. With roots in West African call-and-response traditions and a significant grounding in African American churches, these musicians had an enormous influence on the music. White musicians, noticing the popularity and innovation of the genre, followed suit, with artists like Elvis Presley adopting the rock beat and achieving instant celebrity and notoriety. Presley, along with other white artists, helped to amplify the genre, blurring the racial lines through their music, which appealed to youths of all backgrounds. Rock 'n' roll also played a role in challenging racial barriers, coinciding with social progress such as the Brown v. Board of Education ruling, and by integrating both white and black music into popular culture. The adoption of rock beats by white bands was not only quicker due to their faster access to mass media and larger platforms but also because of the commercialization of the genre, which capitalized on the rebellious spirit that the music symbolized amongst the youth.