The illegal lobster harvesting was not so extensive that the population of catchable lobsters in Belukia’s territorial waters had sharply declined by 1996

从句子上会会理解成非法抓龙虾不是很普遍以致能抓到的龙虾数量大大降低的
但结合题目和句意这句话应该是非法抓龙虾不会普遍到能抓到的龙虾数量大大降低了
请问这种so that的解构怎么理解

这句写得很差很差！不知道作者的意思是不是这个：
The illegal lobster harvesting was not so extensive as to cause the population of catchable lobsters in Belukia’s territorial waters to decline sharply by 1996.
还是这个：
The illegal lobster harvesting was so extensive that the population of catchable lobsters in Belukia’s territorial waters had sharply declined by 1996.

汗，你也这么觉得，这个是管卫东逻辑的选项，我看第一眼就把他排除的，后来没的选回头选的他。
意思肯定是你说的第一个