He was sorry he hadn’t said goodbye to her at the...

Câu hỏi: He was sorry he hadn’t said goodbye to her at the airport.

A. He regretted not to say goodbye to her at the airport.

B. He regretted not to saying goodbye to her at the airport.

C. He regretted saying goodbye to her at the airport.

D. He wished he had said goodbye to her at the airport.