The nurse is assessing a 3-year-old toddler.
What is the expected weight gain for this age child?

Choice A rationale: Toddlers who can stay dry for about 2 hours demonstrate bladder capacity and control, indicating readiness for toilet training initiation and successful bladder training outcomes.

Choice B rationale: Three hours of dryness exceeds typical toddler bladder capacity; most children cannot consistently achieve this duration until later developmental stages, making it less reliable for readiness assessment.

Choice C rationale: Four hours of dryness is uncommon in toddlers; bladder control at this level usually develops in preschool years, not during early toilet training readiness evaluation.

Choice D rationale: Five hours of dryness is unrealistic for toddlers; such extended control reflects older child bladder maturity, not appropriate for determining readiness in early toilet training.

Choice A rationale:

"The infant has ineffective digestive enzymes" (Choice A) is not the primary reason for offering iron-rich formula to a 6-month-old infant. While infants may have limited digestive enzymes, the primary reason for introducing iron-rich foods or formula at this age is related to their iron stores being depleted, not enzyme function.

Choice B rationale:

Choice B is the correct answer because at around 6 months of age, an infant's iron stores received from the mother during pregnancy start to deplete. Breast milk, which is often the sole source of nutrition for infants, may not provide sufficient iron to meet their growing needs. This is why it's important to introduce iron-rich foods or formula at this stage to ensure the infant continues to receive an adequate supply of this essential mineral.

Choice C rationale:

"The infant has a limited ability to produce red blood cells" (Choice C) is not the primary reason for introducing iron-rich formula. While iron is essential for red blood cell production, the primary concern at this stage is the depletion of iron stores from the mother.

Choice D rationale:

"The infant has a need for iron to support dentition" (Choice D) is not a valid explanation for introducing iron-rich formula to a 6-month-old infant. Iron is not primarily related to the development of teeth, and this statement does not address the key nutritional needs of the infant at this age.