"Now, children," she said. "Do any of you ever make someone else glad?" "Yes, teacher," said a small boy. "I made someone glad yesterday." "Well done. Who was that?" "My granny." "Good boy. Now tell us how you made your grandmother glad. " "Yes, teacher. I went to see her yesterday, and stayed with her for three hours. Then, I said to her: "Granny, I' m going home," and she said: "Well, I' m glad!" We can infer from the end of the story that  _  .
the boy was very naughty the boy did a lot to make granny glad granny had a good time with the boy granny hoped to stay longer with the boy