1.  Statement : Lack of stimulation in the first four or five years of life can have adverse consequences.
Assumptions : 

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.

A. Only assumption I is implicit.
B. Only assumption II is implicit.
C. Either I or II is implicit.
D. Neither I nor II is implicit.
E. Both I and II are implicit.

Answer: Option A

Explanation:

The lacking in first four or five years can be adverse because it is the main period of development. So, I is implicit. Since nothing is mentioned about the predictability of intelligence, II is not implicit.