Which performer established the solo song as an important part of hillbilly music?Multiple ChoiceRoy AcuffJimmie RodgersElvis PresleyJohnny Cash

The performer who established the solo song as an important part of hillbilly music is Jimmie Rodgers.

Explanation

Jimmie Rodgers, often referred to as the "Father of Country Music," played a significant role in the development of the genre in the early 20th century. His style blended various music influences, including blues, folk, and traditional country, which helped to shape the sound of hillbilly music. In his performances, Rodgers emphasized the solo format, showcasing his voice and storytelling abilities, which resonated with audiences and set a precedent for future country artists. His popular songs, characterized by their emotional depth and narrative quality, highlighted the importance of the solo performance in country music, influencing generations of musicians who followed.

While Roy Acuff, Elvis Presley, and Johnny Cash are also pivotal figures in country music, it was Jimmie Rodgers who truly laid the groundwork for the solo singer-songwriter approach that became integral to the genre.