How Does Neuropsychological Research Attempt to Explain Infantile Amnesia

How does neuropsychological research attempt to explain infantile amnesia?

A) The largest changes in the nervous system are mostly completed by two years of age so memory storage can begin.
B) Memories cannot occur until consciousness and the development of language are occurring simultaneously.
C) All memories are suppressed in our unconscious because we secretly harbour sexual feelings for our parent of the opposite sex.
D) The memories that were formed before the age two have been long forgotten because of retroactive interference.
E) All of the above
F) a, b, and c are correct
G) a, b, and d are correct
H) a and b only