Which of the Following Statements Concerning Socioeconomic Class and Childhood

Which of the following statements concerning socioeconomic class and childhood development is correct?

A) There seems to be no difference in developmental patterns based on socioeconomic status.
B) Children from the lower economic classes tend to be somewhat delayed than those from the higher classes.
C) Children from higher economic classes tend to be somewhat larger,but less robust than those from lower classes.
D) Children who grow up in more favorable economic conditions develop differently than those who grow up in less favorable conditions.