The nurse teaches a pregnant woman about the presumptive, probable, and positive signs of pregnancy.
The woman demonstrates understanding of the nurse's instructions if she states that a positive sign of pregnancy is:.

Choice A rationale:
Abdominal respirations do not directly predispose toddlers to frequent infections such as otitis media, tonsillitis, and upper respiratory tract infections. Abdominal respirations are a normal breathing pattern in toddlers, transitioning from the diaphragmatic breathing seen in infants. This change is due to the toddler's increased chest wall compliance and stronger intercostal muscles, facilitating more efficient breathing.
Choice B rationale:
Slower pulse and respiratory rates in toddlers compared to infants are part of normal physiological development. Toddler's heart rates range from 70 to 110 beats per minute, and respiratory rates range from 20 to 30 breaths per minute. These rates are considered normal for toddlers and do not predispose them to frequent infections.
Choice C rationale:
Toddlers do have less efficient defense mechanisms than infants, making them more susceptible to infections. This is due to the immature immune system in toddlers, which is still developing and learning to respond to various pathogens. However, this choice is not the most important factor predisposing toddlers to frequent infections; other factors play a more significant role.
Choice D rationale:
The presence of short, straight internal ear/throat structures and large tonsil/adenoid lymph tissue in toddlers is the most important factor predisposing them to frequent infections such as otitis media, tonsillitis, and upper respiratory tract infections. These anatomical features make it easier for bacteria and viruses to enter and infect the respiratory and ear passages, leading to recurrent infections.

Choice A rationale:
Adjusting the insulin dosage without proper medical guidance can be dangerous for a child with diabetes. Giving half the regular morning dose without considering the child's current blood glucose levels can lead to hypoglycemia, a potentially life-threatening condition. This choice is unsafe and incorrect.
Choice B rationale:
Substituting simple carbohydrates or calorie-containing liquids for solid foods might help maintain the child's blood glucose levels to some extent. However, it's crucial to ensure that the child's overall nutritional needs are met. In cases of illness, monitoring blood glucose levels and consulting with a healthcare provider are essential. This choice, while not the best option, could be a temporary measure if the child is not eating solid foods due to illness.
Choice C rationale:
Giving the child plenty of unsweetened, clear liquids is the most appropriate choice. This helps prevent dehydration, a common concern when a child is not eating or drinking adequately due to illness. Clear liquids, such as water, clear broths, or oral rehydration solutions, can help maintain hydration and provide some electrolytes. It's essential for parents to monitor the child's condition closely and seek medical advice if the child's condition worsens.
Choice D rationale:
Taking the child directly to the emergency department is not necessary if the child is only experiencing a minor illness and is not eating. However, if the child shows signs of severe dehydration, persistent vomiting, or other concerning symptoms, seeking medical attention promptly is crucial. In the absence of these severe symptoms, choice C is the most appropriate course of action.