OG第21题的D E项

lllmmm

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(正确）
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,
DE两项从语法上说也是对的，难道是因为改变了语义的强调重点而错了吗？

Christianyang

现在分词修饰主语时，时态必须可以还原。但是现在分词无法还原到现在完成时，所以DE两项一定是错的。