According to Klineberg's Cumulative Deficit Hypothesis, What Can Be Predicted

According to Klineberg's cumulative deficit hypothesis, what can be predicted about the intellectual deficits of children who are raised in impoverished environments?

A) Those who start with the most intellectual potential will show the greatest deficits in intellectual performance.
B) The effects of this environment during the first five years will be less detrimental than a comparable exposure that starts during grade school.
C) The older children in a family should score lower on IQ tests than their younger siblings.
D) As the size of a family increases, the average IQ score of all the family members decreases.