Which Nashville-based radio show, founded in 1925, is the longest-running radio broadcast in history and launched the careers of countless country music stars?

• A Louisiana Hayride
• B Austin City Limits
• C Prairie Home Companion
• D Grand Ole Opry ✓

The Grand Ole Opry began as the WSM Barn Dance and became the most important venue in country music, with membership considered the highest honour in the genre.