Answer:
Rock n' Roll
Step-by-step explanation:
In the late 1950s, the emergence of rock 'n' roll pulled fans away from the country music industry, forcing Nashville producers to search for a sound that could appeal to the whole country and be profitable while still being country, and they found the Nashville Sound. The Nashville Sound originated during the mid-1950s as a subgenre of American country music, replacing the chart dominance of the rough honky tonk music, which was most popular in the 1940s and 1950s, with "smooth strings and choruses", "sophisticated background vocals" and "smooth tempos"