The parent of a toddler calls the nurse, asking about croup. What is a distinguishing manifestation of croup?

Choice A reason: This is not a valid basis for the nurse's response, as it implies that the child sleeps with the parents because of a lack of attention during the day. This may not be the case, and it may also offend the parents by questioning their parenting skills.

Choice B reason: This is a valid basis for the nurse's response, as it acknowledges the diversity and variability of family practices and preferences. It also shows respect and sensitivity for the parents' and the child's needs and comfort.

Choice C reason: This is not a valid basis for the nurse's response, as it is false and exaggerated. Sleeping with one's children is not illegal or abusive, unless there is evidence of harm or neglect. It may also alarm and anger the parents by accusing them of a crime.

Choice D reason: This is not a valid basis for the nurse's response, as it is based on a rigid and arbitrary developmental milestone. There is no fixed age for separating from parents, and it may vary depending on the child's temperament, attachment, and environment. It may also pressure and guilt the parents by implying that they are delaying their child's growth.

Choice A reason: Stridor is a high-pitched, harsh sound that occurs during inspiration. It is caused by the narrowing of the upper airway due to inflammation and edema. Stridor is a characteristic sign of croup, also known as laryngotracheobronchitis.

Choice B reason: Wheezes are high-pitched, musical sounds that occur during expiration. They are caused by the narrowing of the lower airway due to bronchoconstriction or mucus. Wheezes are more common in asthma than in croup.

Choice C reason: Crackles are fine, crackling sounds that occur during inspiration. They are caused by the opening of collapsed or fluid-filled alveoli. Crackles are more common in pneumonia or heart failure than in croup.

Choice D reason: Rhonchi are low-pitched, snoring sounds that occur during expiration. They are caused by the vibration of mucus in the large airways. Rhonchi are more common in bronchitis or cystic fibrosis than in croup.