forests supply pharmaceuticals and provide employment ...两个动词supply和provide需要平行
choice b, supply 1)pharmacy and 2) source of building material and firewood意思变成了两个宾语并列。导致了supply和are providers之间没有任何连词
choice a,b,c都是recognize (V) + rental rates (O) + 宾补( C) 的结构，但是由于recognize的约束力本身比较弱，所以宾补的形式出现并不合适。
choice d, within the city limits 介词宾语作状语修饰动词charge，但是意思上应该是作为定语修饰名词property
based on,It would apply to the women themselves (the following subject).The
women are not based on ancient records, so that's wrong.
according to the records是可以接受的。问题出在choice c, the robe that they used to dress the statue,暗示了这个robe像是一个工具; 而choice d, 完整的传递出了女人们把robe穿在statue身上的意思
the time interval "three years" is modified by a clause beginning with a subordinate conjunction ("after" in (A) and "since" in (C)). Because it's modified in this way, it does not need a preposition.
choice b, since releasing African honeybees中，releasing的主语变成了their descendants. incorrect
choice d, when时间状语强调‘同时发生’，意思就变成‘释放鸟之后的35年’ 和‘后代移民到了得克萨斯南部’同时发生
choice e, 变成了并列句，也割裂了句子之间的联系。
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另外choice c, 由于采取了被动语态导致include的发出者不明确。但是结合前后文的意思，include的发出者明确得指向了ECS