Based on Studies of Infants and Children in Orphanages, Rene

Based on studies of infants and children in orphanages, Rene Spitz concluded which of the following,

A) Responsiveness of the caregiver to infants' cries and other gestures of communication are crucial to infant development.
B) Infants and children in orphanages who were provided scheduled care showed normal development.
C) Many of the infants and children in orphanages who did not get responsive care became overweight.
D) There are few differences between infants and children raised by their biological parents and their counterparts in orphanages.