大全-20-2 2. Mud from a lake on an uninhabited wooded island in northern Lake Superior contains toxic chemicals, including toxaphene, a banned pesticide for cotton that previously was manufactured and used, not in nearby regions of Canada or the northern United States, but in the southern United States. No dumping has occurred on the island. The island lake is sufficiently elevated that water from Lake Superior does not reach it. The statements above, if true, most strongly support which of the following hypotheses?归纳T (A) The waters of the island lake are more severely polluted than those of Lake Superior. (B) The toxaphene was carried to the island in the atmosphere by winds. (C) Banning chemicals such as toxaphene does not aid the natural environment. (D) Toxaphene has adverse effects on human beings but not on other organisms.（B） (E) Concentrations of toxaphene in the soil of cotton-growing regions are not sufficient of be measurable. 请问最后一句话在这里起什么作用啊？The island lake is sufficiently elevated that water from Lake Superior does not reach it. 上面话中的The island lake 是指 Mud from a lake on an uninhabited wooded island in northern Lake Superior 中的lake吗？我想不是的，因为原文第一句话说这个lake里面的mud是有毒的，那最后一句话里面的The island lake 又是指哪个lake呢？我完全晕了，救命啊~~~~~ | 
