根据短文理解，选择正确答案。
Once upon a time the colors of the world started to quarrel.
Green said, “Clearly I am the most important. I am the sign of life and hope. I was chosen for grass, trees and leaves. Look over the countryside and you will see that I am in the majority.”
Blue interrupted, “You only think about the earth, but consider the sky and the sea. It is the water that is the basis of life.”
Yellow chuckled(咯咯地笑). “The sun is yellow, as well as the moon and the stars. Every time you look at a sunflower, the whole world starts to smile.”
Red could bear it no longer. “I am the ruler of all of you. I am blood-life's blood! I am the color of danger and bravery. I bring fire into the blood. I am the color of passion and love.”
Purple stood at his full height. “I am the color of royalty(皇室) and power. I am the sign of authority (权力) and wisdom. People do not question me! They listen and obey.”
Finally Indigo(靛蓝) spoke with determination, “Think of me and I am the color of silence. I represent thought and reflection. You need me for balance and contrast(对比), for prayer and inner peace.”
The colors went on boasting(吹嘘), each showing off his or her own advantages. Suddenly there came a flash of bright lightening. Thunder rolled and boomed. Rain started to pour down. The colors were scared to death.
In the midst of the quarrelling, rain began to speak, “You foolish colors. Don't you know that you were each made for a special purpose, unique and different? Join hands with one another and come to me.”
Doing as they were told, the colors united and joined hands.
From then on, when it rains, colors will stretch across the sky in a great bow of color.
Whenever a rainbow appears in the sky, let us remember to appreciate one another.
嫦娥二号”发射升空时，正确的说法是
