甲，乙，丙，丁四位同学各自对A，B两变量的线性相关试验，并用回归分析方法分别求得相关系数r如表：

则这四位同学的试验结果能体现出A，B两变量有更强的线性相关性的是（　　）

    Little Red Riding Hood lives near a forest (森林). She often goes to visit her grandma. She usually brings her some food. One day, when she is on her way to her grandma's home, a wolf sees her. The wolf stops her and asks, “Where are you going?” “My grandma's home.” answers Little Red Riding Hood. The wolf suggests (建议）picking some flowers for her grandma. The wolf runs to her grandma's home first. He eats the grandma. He is lying (躺）in the grandma's bed. Little Red Riding Hood comes and the wolf wants to eat her. Little Red Riding Hood cries for help. A hunter (猎人）comes quickly. The wolf is afraid, and he runs away.

问题背景

已知在△ABC中，AB边上的动点D由A向B运动（与A，B不重合），点E与点D同时出发，由点C沿BC的延长线方向运动（E不与C重合），连接DE交AC于点F，点H是线段AF上一点．

字母D是字母表中的第__________个字母。