"It was so kind of you to give me the flowers," La...

Câu hỏi: "It was so kind of you to give me the flowers," Lan said to Minh.

A. Lan thanked Minh to give her the flowers.   

B. Lan thanked Minh on giving her the flowers.

C. Lan thanked Minh for giving her the flowers.

D. Lan thanked Minh to be kind to give her the flowers.