Four-month-oldAiden smiles, laughs, and babbles more freely when interacting with his mother and quiets more quickly when she picks him up, compared to an unfamiliar caregiver. But he does not protest when separated from his mother. According to Bowlby,

Aiden is in the ________ phase.

A) preattachment
B) “attachment-in-the-making”
C) “clear-cut” attachment
D) formation of a reciprocal relationship

Answer: B