阅读下列短文，从下面每小题的A、B、C、D四个选项中选择最佳选项。
I first met Windy, a six-year-old girl, on the beach near where I lived. She was building a sand house there. She looked up, and her eyes were as blue as the sea. Every time when I felt unhappy, I drove to the beach.
"Hello, Miss Agnes," she said. I answered, but I didn't really want to stop her. "I'm building," she said. I saw that.
"What is it?" I asked her. "Oh, I don't know. I just like the feeling of the sand." Oh, that's good, I thought, and took off my shoes to join her. A sandpiper (一种叫做鹬的水鸟) flew by. She told me that it would make me happy. I felt better then.
A week later on my next visit, I learned that Windy lived in a cottage (小屋) and didn't go to school. Soon after that, my mother died, and I rushed to the beach to be alone. I didn't want to say anything when Windy came up to me. "Why?" she asked.
I turned to her and shouted, "Because my mother died!" "Oh," she said quietly, "then today is a bad day."
A month later, I went to the beach but couldn't find Windy. I missed her so much that I visited her house. I learned that Windy had died of leukemia (白血病), but she left a picture of a sandpiper for me.