Read the following passage and choose the best answer.

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John is a nice boy. He likes chocolates very much. However, his mother never gives him any because she thinks they are bad for his teeth. His grandfather loves him very much. He sometimes buys John some when he comes to see his grandson. Then his mother lets him eat them because she wants to make the grandpa happy.

One evening, a few days before John’s eighth birthday, he was saying his prayers in his bedroom. “Please, God”, he shouted, “make my friends give me a big box of chocolates for my birthday on Saturday”. His mother was in the kitchen and she heard the small boy shouting and went into his bedroom quickly.

“Why are you shouting, John?” she asked her son, “God can hear when you talk quietly”.

“I know”, answered the clever boy with a smile, “but Grandfather’s in the next room, and he can’t”.

Why does his grandfather give him chocolates?