根据短文理解，从A、B、C、D四个选项中选择最佳答案填空。

    King Akbar was in the habit of putting riddles and puzzles to his people. He often asked 1 which were strange. His people had to use words in a 2 way to answer these questions.

    Once Akbar asked a very strange question. He looked at his people. As he looked, one by one the heads began to hang low in search of a(an) 3. It was at this moment that Bribal entered the palace. Birbal  4 the habit of the king. He understood the 5 at once and asked, “May I know the question so that I can 6 for an answer?”

    Akbar said, “How many crows(乌鸦)are there in the city?”

    Without even a moment's thought, Birbal 7, “There are fifty thousand five hundred and eighty nine crows, My Lord. "

    “How can you be so 8?” asked Akbar.

    Birbal said, “Make your men 9, My Lord. If you find more crows it means some have come to visit their relatives here. If you find 10 crows it means some have gone to visit their relatives somewhere else. "

    Akbar was pleased very much by Birbal's wise answer.