Adele tries hard but she doesn't make much progres...

Câu hỏi: Adele tries hard but she doesn't make much progress.  

A  Adele tries hard so that she can make much progress.

B Adele tries hard ; she doesn't make much progress, though.

C However hard does she try, Adele doesn't make much progress.

D Though Adele tries hard but she doesn't make much progress.