Given the question: Read the article and select the best answer. Article: An old Japanese man kept a sparrow and he really liked it. But one day the bird flew away. He became sad and went out to look for it. At last, he met the bird on a mountain. [:Zxxk.Com] He asked excitedly, "Will you please go home with me, my bird?" Though the bird was also happy to see the old man, it shook its head. "Take me to your home and let me see how you live," the old man said. The bird led the old man to its new home. And he found it lived well with many other birds. So he decided to go back. Before he was leaving, the bird gave him a basket. When he returned home, he told his wife what had happened. She opened the basket and saw a lot of gold. The old woman was very greedy and she wanted to get more baskets. So she set out for the sparrow's home. "Hello, sparrow. I miss you very much," cried the woman falsely . The bird said nothing. It gave her two baskets, a light one and a heavy one. The bird asked her to choose one and she could only open it after she reached home. Of course, she chose the heavy one and took it home with great difficult. However, when she opened the basket, she found it was full of stones! Question: What does the story mainly want to tell us? Options: A: When you are kind to others, they do the same for you. B: Any kind person is able to get what they want. C: We should try our best to be kind and friendly to birds. D: We can get lots of gold if we are friendly to birds.
The answer is:
A