【单选题】

Woman: Is the rescue crew still looking for survivors of the plane crashMan: Yes, they have been searching the area for hours, but they haven't found anybody else. They'll keep searching until night falls.Question: What do we learn from the conversation
A．All the passengers were killed.

B．The plane crashed in the night.
C．No more survivors have been found.
D．It's too late to search for survivors.