Final answer:
Rock and roll music played a significant role in blurring racial lines and pushing for advancements in ending segregation in the United States.
Step-by-step explanation:
Rock and roll music, which stemmed from African American rhythm and blues, played a significant role in blurring racial lines and pushing for advancements in ending segregation in the United States. In the 1950s, rock and roll became popular among both white and black teenagers, bringing them together through the shared enjoyment of music. The genre's popularity and profitability forced record companies to sign black musicians and sell records from both black and white artists in the same stores. Additionally, TV shows like the Ed Sullivan Show and American Bandstand provided a platform for black and white teenagers to interact socially, breaking down barriers of prejudice.