泸州市纳溪区白节镇大旺竹海自然风景区以竹盛名，可与蜀南竹海媲美，其竹子的生长过程中，分生组织通过细胞的分裂和分化，形成的植物结构层次是（　　）

根据短文理解，从A、B、 C、D四个选项中选择最佳答案填空。

    Hello, I'm Lisa Simpson. This is a photo(照片) of my family. This is 1 father, Homer Simpson. He likes 2. The football is his good friend. This is my 3, Marge Simpson. Her hair is 4, but I don't like red. And this is my brother, Bart. He likes 5. His favourite sport is skateboarding(滑板). He can 6 football, too. 7 he write Chinese? No, he can't. Maggie is my sister.     8 is three years old. Her favourite 9 is cake. 10 is she? Oh, she is in my mother's arms.