Correct Answer: B

Rationale: The NCHS growth charts serve as reference guides for all racial or ethnic groups, including African American children. The 20th percentile for height and weight does not indicate nutritional failure but provides a reference point for ongoing assessment. Choice A is incorrect because being at the 20th percentile does not automatically imply the need for nutritional intervention. Choice C is incorrect as there is no correction factor specifically used for nonwhite ethnic groups in this context. Choice D is incorrect as a single measurement at the 20th percentile can provide valuable information for assessment.

Correct Answer: B

Rationale: The correct answer is B: Associative. Associative play is common in preschoolers, where children engage in separate activities but interact by sharing toys and talking with each other. This stage is characterized by more social interaction than solitary play (option A), where children play alone without interacting with others. Cooperative play (option C) involves children working together towards a common goal, which is typically seen in older children. Parallel play (option D) is when children play alongside each other but do not actively engage with one another, which is more common in toddlers.

Correct Answer: D

Rationale: These behaviors are consistent with FTT and indicate social withdrawal, which is often observed in infants who are not thriving. A wide-eyed gaze and avoidance of eye contact can also indicate developmental delays or emotional disturbances.

Correct Answer: B

Rationale: Visine is not harmless when ingested, and immediate medical treatment is necessary due to the risk of toxicity. Vomiting should not be induced without medical advice, and dilution with water is not an appropriate treatment.

Correct Answer: A

Rationale: Picking up a pencil requires the use of the pincer grasp, which involves the coordination of the thumb and forefinger to hold small objects. The pincer grasp is a fine motor skill essential for tasks that necessitate precision and dexterity. Choices B, C, and D are incorrect. Prehension refers to the act of grasping or holding an object, parachute reflex is a protective response to sudden movement or loss of support, and grasp reflex is an automatic closing of the hand when an object is placed in the palm, none of which specifically relate to the action of picking up a pencil.