Correct Answer: A

Rationale: The Snellen letter chart is the most commonly used test for measuring visual acuity, particularly in school-age children and adults.

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: A

Rationale: The review of systems is a critical part of a health history, helping to identify any symptoms or conditions that need further evaluation.

Correct Answer: B

Rationale: Cultural humility, sensitivity, and competency are key components in providing culturally competent care in healthcare encounters.

Correct Answer: A

Rationale: In Freud's psychosexual development theory, the oral stage is the first stage and occurs during infancy. It focuses on activities involving the mouth, such as sucking and feeding. This stage is crucial for the child's development as it forms the basis for trust and attachment. Choices B, C, and D are incorrect as latency refers to the stage during middle childhood where sexual impulses are suppressed, genitality refers to the final stage focusing on mature sexual relationships, and anality refers to the stage occurring during the toddler years where toilet training plays a significant role.