Final answer:
George Gershwin blended Jazz and classical music in 'Rhapsody in Blue', combining two distinct genres into an iconic piece of the American concert repertoire.
Step-by-step explanation:
In 'Rhapsody in Blue', George Gershwin blended A) Jazz and classical music, creating a piece that has become a staple of the American concert repertoire.
His iconic work is known for its sophistication, embodying the vibrant cultural atmosphere of the 1920s. Jazz, being a uniquely American music form born from blues and other influences, perfectly intertwined with classical structures and harmonies in Gershwin's composition, highlighting the innovative and hybrid nature of American music during that era.