The parents of a 9-month-old infant tell the nurse that they have noticed foods such as peas and corn are not completely digested and can be seen in their infant's stools. The nurse's explanation of this is based on which of the following?

Correct Answer: D

Rationale: The correct answer is D because the incomplete digestion of solid foods in the stools of a 9-month-old infant is normal due to the immaturity of the digestive tract at this age. It is a common occurrence in infants and does not necessarily indicate a problem.

Correct Answer: D

Rationale: Intense itching is a hallmark feature of atopic dermatitis often leading to scratching and worsening of symptoms.

Correct Answer: C

Rationale: Angioedema is not a major criterion for atopic dermatitis; it is more associated with allergic reactions.

Correct Answer: C

Rationale: Wilson's disease is an autosomal recessive disorder characterized by defective copper excretion, leading to high urinary copper and low ceruloplasmin levels.

Correct Answer: D

Rationale: Tricuspid atresia leads to severe cyanosis due to lack of right atrioventricular connection, necessitating a right-to-left shunt for survival. It presents early with cyanosis and hypoxia requiring urgent intervention.