A nurse observes a 10-month-old infant who becomes calm when held by a familiar caregiver and smiles during play. According to Erikson's psychosocial theory, which stage is the infant successfully demonstrating?

Choice A reason: Industry vs. Inferiority applies to school-age children (6–12 years) and involves developing competence in academic and social tasks. It is not relevant to infants. Choice B reason: Initiative vs. Guilt is typical of preschoolers (3–6 years) who begin to assert themselves through play and social interactions. The infant’s behavior does not reflect this stage. Choice C reason: Trust vs. Mistrust is the first stage of Erikson’s psychosocial theory, occurring from birth to 18 months. The infant’s calm response to a familiar caregiver and joyful play indicate a secure attachment and successful resolution of this stage. Choice D reason: Autonomy vs. Shame and Doubt occurs in toddlers (1–3 years) and involves developing independence in basic tasks. While emerging autonomy may be present, the behaviors described are more aligned with trust development.