The Nurse Observes an Infant Interacting with His Parents

The nurse observes an infant interacting with his parents. Which of the following are normal social behavioral developments for this age group? Select all answers that apply.

A) Around 5 months the infant may develop stranger anxiety.
B) Around 2 months the infant exhibits a first real smile.
C) Around 3 months the infant smiles widely and gurgles when interacting with the caregiver.
D) Around 3 months the infant will mimic the parent's facial movements, such as sticking out the tongue.
E) Around 3 to 6 months of age the infant may enjoy socially interactive games such as patty-cake and peek-a-boo.
F) Separation anxiety may also start in the last few months of infancy.