Correct Answer: C

Rationale: By 3 to 4 months of age, an infant should be able to fix on and follow a target, indicating proper visual development.

Correct Answer: C

Rationale: Children who began primary immunization at the recommended age but fail to receive all the doses do not need to begin the series again but should receive only the missed doses. The child may receive missed vaccinations on a catch-up schedule per CDC guidelines.

Correct Answer: D

Rationale: Allowing the child to place their hand over the nurse's hand helps reduce the tickling sensation and increases the child's comfort during the examination.

Correct Answer: C

Rationale: The FACES Pain Rating Scale is suitable for children as young as 3 years of age. It uses facial expressions to depict different levels of pain, making it easy for young children to understand and use. The Poker Chip Tool is validated for children aged 4 and older who have a certain level of cognitive ability. The Visual Analog Scale is more appropriate for children aged 7 and above. The Word-Graphic Rating Scale, which uses descriptive words, is recommended for children in the age range of 4 to 17 years.

Correct Answer: A

Rationale: Introducing oneself is the first step in establishing a rapport and setting a professional tone for the interaction.