Correct Answer: C

Rationale: Osteosarcoma is typically treated with a combination of surgery and chemotherapy. This approach aims to remove the tumor and reduce the risk of metastasis. Amputation of the affected extremity may be necessary in some cases to ensure complete removal of the tumor. Intensive radiation is not the primary treatment for osteosarcoma, and bone marrow transplantation is not the standard treatment for this type of cancer.

Correct Answer: C

Rationale: A diet rich in vegetables, legumes, and starches can provide sufficient amino acids, particularly when complemented with varied food sources to ensure a balanced intake of essential nutrients.

Correct Answer: B

Rationale: Opisthotonos with pain on flexion is a sign of possible meningitis or other serious neurological conditions, requiring immediate medical evaluation.

Correct Answer: B

Rationale: Allowing adolescents to express their feelings helps them feel heard and supported, which is crucial for effective communication.

Correct Answer: B

Rationale: The correct answer is B: Tanner staging. Tanner staging is a tool specifically used to assess sexual maturity in adolescents based on the development of secondary sexual characteristics. The Tanner scale ranges from stage 1 (prepubertal) to stage 5 (adult maturity). This tool helps healthcare providers evaluate the physical development and sexual maturation of individuals. Choice A, the Denver II Developmental Screening, is used to assess developmental milestones in children. Choice C, antibody testing, is a diagnostic tool used to detect the presence of specific antibodies in the blood. Choice D, the nursing process, is a systematic method that nurses use to deliver patient-centered care, involving assessment, diagnosis, planning, implementation, and evaluation.