What can people know from the crown of an ancient tree found in New York? Why was it possible for these ancient trees let more

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问题 What can people know from the crown of an ancient tree found in New York?
Why was it possible for these ancient trees let more light through than modern ones?

选项 A、Because they were closely spaced, only 3 to 16 feet apart.
B、Because they were smaller plants and shrubs.
C、Because their branches did not fan out as far as to form a shape like umbrella.
D、Because they had very small leaves like that of fern and dropped easily.

答案C

解析 根据题干中let more light through,可以定位到第五段最后一句。这句提到了这些古老的树木可能会比现代的树木更能够透射阳光,因为它们树枝的结构不是向四周扩展的很远以致形成伞状。这些古树长得很密不是它们能透射更多的阳光的原因,故可排除A;小植物和灌木只是古老森林的一部分而不是所有的树木都这样,而且这也不是能透射更多阳光的原因,故可排除B;这些树木的叶子小而且容易掉也不是能透射更多的阳光的原因,故可排除D。
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