How clever of you to have solved the puzzle so quickly, said the mother.

• A. The mother exclaimed with joy that he was clever enough to solve the puzzle so quickly.
• B. The mother expressed that he was so clever to have solved the quickly.
• C. The mother told that he was very clever in solving the puzzle so quickly.
• D. The mother exclaimed admiringly that it was very clever of him to have solved the puzzle so quickly.