题目感觉歧义怎么办？

wellmichelle

Neuroscientists, having amassed a wealth of knowledge over the past twenty years about the brain and its development from birth to adulthood, are now drawing solid conclusions about how the human brain grows and how babies acquire language.
A.Neuroscientists, having amassed a wealth of knowledge over the past twenty years about the brain and its development from birth to adulthood, are
B.Neuroscientists, having amassed a wealth of knowledge about the brain and its development from birth to adulthood over the past twenty years, and are
C.Neuroscientists amassing a wealth of knowledge about the brain and its development from birth to adulthood over the past twenty years, and are
D.Neuroscientists have amassed a wealth of knowledge over the past twenty years about the brain and its development from birth to adulthood,
E.Neuroscientists have amassed, over the past twenty years, a wealth of knowledge about the brain and its development from birth to adulthood,


关于这道题的时态解释我能理解，但是我总觉得“over the past twenty years”的放置位置是有讲究的，A中不是会理解成为“搜集了——近二十年有关脑的知识”，而不是“搜集了二十年——有关脑的知识”吗？


拓展开来说，请教各位，一般歧义有哪几种可能？怎么判断呢？非常感谢！

HarrisZheng

如果表达你说的第二个含义

a wealth of the knowledge over the past twenty years

wellmichelle

啊？请问你是什么意思？

HarrisZheng

我的意思就是说不会有歧义

要表达你说的第二种含义是我上面那种说法的 要加the