Final answer:
Rock and roll blurred racial lines and helped end segregation by appealing to both Black and White audiences.
Step-by-step explanation:
The birth of rock and roll, which emerged from a combination of rhythm and blues and traditional African American music, blurred racial lines and led to advancements in ending certain types of segregation across the nation. In the 1940s, rhythm and blues (R&B) was predominantly created by Black artists and marketed to Black audiences. However, with the rise of rock and roll in the 1950s, young White audiences became interested in the genre, breaking down racial barriers in music consumption.