【单选题】

M: I wish I hadn’t thrown away that reading list!

W: I thought you might regret it. That’s why I picked it up from the waste paper basket and left it on the desk.
Q: What do we learn from the conversation
A、The man regrets being absent-mindeD、
B、The woman saved the man some trouble.
C、The man placed the reading list on a desk.
D、The woman emptied the waste paper basket.