根据短文内容,选择正确答案。
Kyle walked up and down as he waited for his turn at the back stage. This would be his most important piano performance yet. At ten years old, he was the youngest performer in the Christmas concert. Although his teacher Ms. Neal said he was good enough at the song he would play, he still practiced it more than 30 times that week. When he closed his eyes at night, the music played over and over again in his mind
Now, the day finally arrived, but Kyle was not sure he was ready. He kicked a small ball which was picked up from a Christmas tree, and then looked himself in a mirror—trying to make his bow tie more smooth and beautiful. He thought of his mom who bought him the new suit with this bow tie. He would make her feel proud of him. He noticed that his hands were shaking. How could he play the notes of the song if his hands were shaking? He took a deep breath and tried to calm down, but his hands shook more.
At this time, Ms. Neal walked up to speak to him. “I have something for you,” she said, putting a smooth black stone into Kyle's hand. “It's a special stone. There's no other one like it in the world. You've practiced so much, so you don't need anything else.”
The stage lights reflected on it. “Thank you.” Kyle said.
When Kyle's name was called, he rubbed the stone, stepped onto the stage, and played better than ever. After his performance, he noticed that Ms. Neal had a whole bag of black stones. “Why did you say this one was so special?” he asked.
His teacher smiled, “Like your talent, it is special because it belongs only to you.''