文章题目：Distributions of Tropical Bee Colonies
第五题：
Which of the sentences below best expresses the essential information in the
highlighted sentence in the passage? Incorrect choices change the meaning in
important ways or leave out essential information.
highlighted的句子是：
The number of colonies in the study area was not limited by availability of
suitable trees, and a clumped or regular distribution of colonies was not due
to an underlying clumped or regular distribution of potential nest sites.
个人理解：研究地区中蜜蜂群落的数量不局限于仍有多少可做为巢穴的适栖树种的数量，
且丛聚或规则的群落分布方式也不是基于具潜力的巢穴是否是丛聚或规则分
布。
想问的是选项A跟D之间要如何选择？
A. The limited number of colonies was not due to the distribution or
availability of potential nesting sites.
个人理解：蜜蜂群落的数量限制不是基于潜在巢穴位置的分布或其可否做为巢穴使用。
D. Neither the number nor the distribution of colonies could be explained by
the availability of suitable nest sites.
个人理解：蜜蜂群落的数量或分布不能被适合的穴位是否能用来进行解释。
自己看完觉得两个答案似乎都能选
真要说的话可能A没有提到群落的distribution也不是受潜力巢穴的影响
所以选D完整一点
想请教版上高手对这题的解法QQ