Correct Answer: C

Rationale: The correct answer is bone marrow suppression (Choice C). Methotrexate can lead to bone marrow suppression, resulting in adverse effects such as anemia, leukopenia, and thrombocytopenia. Monitoring for signs of decreased blood cell counts is essential to prevent complications and adjust treatment as needed.

Correct Answer: C

Rationale: The correct answer is 'C: Sore throat.' Doxorubicin is known to have immunosuppressive effects, which can predispose the client to infections. A sore throat can be an early sign of infection, and prompt reporting to the healthcare provider is crucial to initiate appropriate interventions and prevent complications.

Correct Answer: B

Rationale: The healthcare professional should monitor the client for ototoxicity when receiving carboplatin. Ototoxicity is a known serious adverse effect associated with this medication, characterized by damage to the inner ear structures leading to hearing loss or balance issues. Monitoring for hearing changes and balance problems is crucial to detect ototoxicity early and prevent further complications.

Correct Answer: A

Rationale: The nurse should instruct the client to use a soft-bristled toothbrush to prevent bleeding, which can occur due to chemotherapy-induced thrombocytopenia. Chemotherapy can decrease platelet counts, leading to an increased risk of bleeding. Using a soft-bristled toothbrush can help prevent gum bleeding and oral trauma.

Correct Answer: A

Rationale: The nurse should instruct the client to use a soft-bristled toothbrush to prevent bleeding, which can occur due to chemotherapy-induced thrombocytopenia.