Correct Answer: B

Rationale: Adolescents may withdraw from social interactions, worry about the impact of the divorce, and express strong emotions such as anger or sadness.

Correct Answer: D

Rationale: The correct answer is D: Pulsating anterior fontanel. The fontanel should feel flat, firm, and well demarcated. Pulsations are frequently visible at the anterior fontanel, which is a normal finding in a neonate. A closed anterior fontanel, as mentioned, is a potential sign of a major abnormality. A sunken or bulging fontanel (when the infant is quiet) may be indicative of distress or a major abnormality. Therefore, options A, B, and C are considered abnormal findings when assessing the anterior fontanel of a neonate.

Correct Answer: A

Rationale: Immunizations are part of the patient's health history and are recorded under the history section to ensure the child is up-to-date with vaccinations.

Correct Answer: C

Rationale: By 3 to 4 months of age, an infant should be able to fix on and follow a target, indicating proper visual development.

Correct Answer: A

Rationale: The correct answer is A: Respiratory syncytial virus (RSV). RSV is the most common cause of bronchiolitis, especially in infants. Bronchiolitis is characterized by inflammation of the small airways in the lungs. Choice B, Haemophilus influenzae, is a bacterium that can cause respiratory infections but is not the primary cause of bronchiolitis. Choice C, Parainfluenza, is a common viral infection that can cause croup and other respiratory illnesses but is not the main cause of bronchiolitis. Choice D, Rotavirus, is a virus that primarily affects the gastrointestinal system, causing diarrhea and vomiting, and is not associated with bronchiolitis.