An artist went to a beautiful part of the country for a holiday and stayed with a farmer. Every day he went out with his paints and brushes and painted till evening. When it got dary he went back to the farm and had a good dinner before he went to bed. An the end of his holiday he wanted to pay the farmer, but the farmer said, "No, I don’t want money. But give me one of your pictures. What’s money? In a week it will all be finished, but your picture will still be here. " The artist was very pleased and thanked the farmer for saying such kind things about his pictures. The farmer smiled and answered, "It’s not that. I have a son in London. He wants to become an artist. When he comes home next month, I’ll show him your picture, and he will not want to be an artist any more, I think. " The artist thought the farmer wanted a picture of his because______.
A．the farmer was an artist too B．the farmer liked his pictures very much C．the farmer wanted to give it to his son as a present D．the farmer was rich