阅读短文,从每题所给的A、B、C和D四个选项中,选出最佳选项。
A father and his son went to a kite-flying festival. The son was full of joy when he saw the sky filled with colorful kites. He wanted to fly a kite, too. The father then bought a kite for him.
The son started to fly the kite. Soon, his kite was high up in the sky. After a while, he said, "Father, it seems that the string (线) is stopping the kite from flying higher. If we cut it, the kite will be free and fly even higher. Can we cut it?" The father cut the string. The kite started to go higher. This made the little boy happy.
But then, slowly, the kite started to come down. And finally it fell to the ground. The son was surprised to see this. He asked his father, "I thought that after cutting the string, the kite would fly higher. Why did it fall down?"
The father explained, "The string was not stopping the kite from going higher, but was helping it stay in the sky. You helped the kite go up in the right direction using the string. But when you cut the string, it could no longer support the kite."
Sometimes, we may feel like there are certain things that are holding us back (阻碍) and stopping us growing. But in fact, these might be the things that support us the most.