Task: Dialogue Generation
Input (English): F: I'm glad you're back. I was so worried about you. What took you so long? ,M: I had 2 lessons. Both of them were very long.
(A) F: I’m sorry, I didn’t catch that. Would you mind speaking more slowly? (B) F: I was worried that you came back late. So you were having meetings. (C) F: How were the lessons? I worried that they didn't go well. (D) F: You came back so late. I thought something happened to you.
Output (English): D