Correct Answer: A

Rationale: In patients with multiple myeloma, hypercalcemia is a common complication due to the release of calcium from the bones as a result of osteolytic lesions. One of the early symptoms of hypercalcemia is polyuria, or increased urine output. This occurs because elevated calcium levels can lead to impaired renal function and increased renal excretion of calcium, which results in increased urine production. Early recognition of polyuria can help prompt further evaluation and management of hypercalcemia, as untreated hypercalcemia can lead to more severe complications.

Correct Answer: B

Rationale: Hematuria, or blood in the urine, is the most common and distinctive symptom associated with bladder cancer. It can present as either gross hematuria (visible blood) or microscopic hematuria (detected only through urinalysis). The presence of blood in the urine often prompts further evaluation for potential underlying causes, including bladder cancer. It is crucial for healthcare providers to recognize this symptom, as early detection significantly impacts treatment outcomes.

Correct Answer: B

Rationale: Risk for infection is a high priority due to the patient's compromised immune system from AML.

Correct Answer: C

Rationale: Avoiding spicy or acidic foods can help prevent irritation of the mucosa, which is already sensitive during mucositis.

Correct Answer: B

Rationale: After a mastectomy, particularly when lymph nodes are removed, there is an increased risk of lymphedema in the affected arm due to impaired lymphatic drainage. Elevating the affected arm above heart level helps promote lymphatic drainage and reduces the risk of swelling. This intervention facilitates the return of lymph fluid and helps prevent fluid accumulation in the arm.