根据短文内容，选择最佳答案。
In the morning, a grandfather took his grandson to a school. When the boy and his grandfather went into the playground, some children came up.
"What a funny old man!" one boy said, making a face.
"Hey, fatty (胖子)," another one shouted.
The childrenjeered atthem and jumped up and down.
Without saying a word, the old man took his grandson out of the school gate. "Wonderful! I don't have to go to school!" the boy said.
"You do, but not this one," his grandfather replied. "I'll find you a school myself." The grandfather took his grandson back to his own house, asked the boy's grandmother to look after him, and then went out to look for a school himself.
Every time he got to a school, the old man went into a playground, and waited for the children to come out at break time. In some schools the children completely ignored (不理会) the old man, and in others, they made fun of him. When this happened, he would turn sad and go home. Finally, he went into the very small playground of a very small school, and stood tiredly against the wall. The bell rang, and the children got out into the playground.
"Sir, are you all right? Shall I get you something to drink?" a voice said.
"We've got a bench in the playground — come and sit down," came another voice.
Soon a young teacher came out into the playground. The old man greeted him and said, "Finally, I've found my grandson the best school in town."