Mature white pines intercept almost all the sunlight that shines on them. they leave a deep litter that dries readily, and they grow to prodigious height so that, even when there are large gaps in a stand of such trees, little light reaches the forest floor. For this reason white pines cannot regenerate in their own shade. Thus, when in a dense forest a stand of trees consists of nothing but mature white pines it is a fair bet that___.
Which one of the following most logically concludes the argument?
Answer: A. the ages of the trees in the stand do not differ from each other by much more than the length of time it takes a white pine to grow to maturity.
I was able to get the right answer by eliminating the others, however I still do not understand the reasoning. More specifically, how the statement leads logically to this particular answer.
Thanks! sorry if i'm too vague.
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