Statement: Lack of stimulation in the first four or five years of life can have adverse consequences.
I. A great part of the development of observed intelligence occurs in the earliest years of life
II. 50 percent of the measurable intelligence at age of 17 is already predictable by the age of four.
Only assumption I is implicit
Only assumption II is implicit
Either I or II is implicit
Neither I nor II is implicit
Both I and II are implicit