Correct Answer: B

Rationale: Foster children often have higher rates of acute and chronic health problems due to a variety of factors, including previous neglect, trauma, and inconsistent healthcare access.

Correct Answer: B

Rationale: The correct answer is 'Disease prevention.' Modern healthcare places emphasis on preventing diseases to enhance overall health and well-being. While nursing services, symptom management, and disease identification are crucial components of healthcare, disease prevention plays a key role in reducing the burden of illness on individuals and communities.

Correct Answer: A

Rationale: Adolescents typically identify and relate more closely to their peer group, especially during the teenage years when peer relationships become a central focus.

Correct Answer: A

Rationale: More deaths due to unintentional injuries occur in males, which may be due to higher risk-taking behaviors.

Correct Answer: C

Rationale: The sweat chloride test is the primary diagnostic test for cystic fibrosis. Cystic fibrosis is characterized by abnormal transport of chloride and sodium across epithelial cell membranes, leading to increased chloride in sweat. This test is crucial for diagnosing cystic fibrosis in suspected cases. Liver enzymes (Choice A), serum calcium (Choice B), and urine creatinine (Choice D) are not specific tests for cystic fibrosis and would not provide the necessary information for diagnosis in this case.