Which of the Following Six-Year-Old Children Would Be MOST Likely

Which of the following six-year-old children would be MOST likely to experience an increase in their IQ over the next few years?

A) Adam, who continues to live in an understaffed orphanage
B) Mbulelo, who recently started living in an understaffed orphanage following the death of her parents
C) Sipho, who was recently adopted from an understaffed orphanage by loving middle-class parents
D) Rafiq, who continues to live with his loving middle-class parents