According to Research on the Impacts of Socioeconomic Environment on Infant

According to research on the impacts of socioeconomic environment on infant development, infants from low-income households, on average, are at greater risk of not achieving full cognitive potential. This is most likely the result of

A) greater frequency of single parenthood.
B) genetic influences that shape environments.
C) limited experience with cultural objects that appear in standardized tests.
D) a combination of less stimulating home environments, poor nutrition, and limited access to learning materials.
E) increased consumption of unhealthy foods and lack of sleep.