托福听力official32 According to paragraph 4, how do plants manage to germinate in areas with great climatic diversity and climatic extremes? 答案解析

用climatic diversity定位到这一段最后一句话，但这句话只做了总结，没有具体描述这些植物是如何germinate的，所以需要阅读前文的内容，而答案则出现在该段的第2句话：Seeds of a given species exhibit a wide range of germination dates, increasing the probability that at least some of the seeds will germinate during a period of favorable environmental conditions.这里主要强调了这些种子有着很大范围的发芽期，和D选项呼应。A选项的only太过绝对，原文没有这么说；B选项并不是可以在极端气候存活的原因，答非所问；C选项在原文无提及。