Sentence Correction

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,

[spoiler]I'm not interested in the OA but i want to identify as many errors in all the incorrect choices[/spoiler]