Answer :
Final answer:
The research has found that maternal employment has statistically insignificant adverse effects on children from all social classes, and the quality of parenting and other factors play a bigger role in children's cognitive development.
Explanation:
The research investigating the effects of maternal employment on cognitive development in children has revealed that such employment has statistically insignificant adverse effects on children from all social classes (option c). Many studies have been conducted to explore the impact of maternal employment on children's cognitive development. One notable study funded by the National Institute of Child Health and Human Development found that while day-care children may exhibit better cognitive skills than stay-at-home children, the quality of parenting and other factors such as parent's education and income have a bigger influence on children's development (Rabin, 2008).
