Unearthed in China, fossils of feathered dinosaurs offer the most dramatic evidence yet discovered of the close evolutionary relationship between dinosaurs and birds.

1. offer the most dramatic evidence yet discovered of the close evolutionary relationship between dinosaurs and birds
2. offer evidence more dramatic than what has yet been discovered of the close evolutionary relationship between dinosaurs and birds
3. offer more dramatic evidence of the close evolutionary relationship than any yet discovered between dinosaurs and birds
4. have offered the most dramatic evidence of the close evolutionary relationship between dinosaurs and birds that have yet been discovered
5. have offered more dramatic evidence than any that has yet been discovered of the close evolutionary relationship between dinosaurs and birds