What was the primary catalyst behind the formation and rapid rise in popularity of the gospel group 'Mary Mary' in the early 2000s?

A Their adherence to strictly traditional gospel arrangements, which resonated with older audiences. B Their innovative fusion of contemporary R&B, hip-hop, and gospel, attracting a younger and more diverse listenership while addressing relevant social issues. C Their exclusive focus on a cappella performances, showcasing their vocal harmonies. D Their strategic marketing campaign targeting only international markets, bypassing the American gospel scene.