根据短文理解，从A、B、C、D四个选项中选择最佳一项填空。

    Learning how to play the piano is not the only way for children to have a bright future. Children can choose what they like in many ways. Many children are good at sports. Maybe they will be great players when they grow up.

    Here is another example: the 1 in Shanghai have paid much attention to story-telling. Story-telling can also make them 2 excellent students. They 3 many story-telling contests every year. And children have 4 great interest and taken an active part in them. Some students who were too shy to speak in public have been now very good 5. 

    Now many parents 6 their children to learn how to play the piano or the violin. 7 the money and energy they spend cannot make sure that their children will 8 much in a short period of time. However, training children to tell a story is quite9.Although it costs little, it's a good and an easy way 10 children to develop.

美国充分利用不同地区的自然条件，农业生产实现了地区生产的____ 化．

以下是某手机店1～4月份的统计图，分析统计图，对3、4月份三星手机的销售情况四个同学得出的以下四个结论，其中正确的为（　　）