Which American composer, known for fusing classical music with jazz and popular styles, wrote 'Rhapsody in Blue' and the opera 'Porgy and Bess'?

• A Aaron Copland
• B Leonard Bernstein
• C Cole Porter
• D George Gershwin ✓

Gershwin's 'Rhapsody in Blue' (1924) premiered at a concert titled 'An Experiment in Modern Music' and almost single-handedly brought jazz into the concert hall.