What Has Research on the Effects of the Lack of Normal

What has research on the effects of the lack of normal stimulation, nutrition, comfort, or love on children from neonates to preschoolers revealed?

A) Children who do not receive optimal levels of stimulation from their parents can still develop normally by way of enhanced nutrition.
B) Mild forms of perceptual, intellectual, and emotional deprivation are not correlated with poverty.
C) Poverty has an impact on all types of deprivation except intelligence.
D) All of childhood should be viewed as a relatively sensitive period.