Correct Answer: A

Rationale: The correct answer is A: Assessment. In the scenario, the nurse failed to assess the patient's condition promptly after the patient complained of feeling dizzy and light-headed. Assessment is the first phase of the nursing process and involves collecting data to identify the patient's health status. By not reassessing the patient's vital signs and symptoms, the nurse missed an opportunity to detect the worsening condition. The other choices are incorrect because the error occurred before diagnosis (B), implementation (C), and evaluation (D) phases. In diagnosis, the nurse identifies the patient's problems; in implementation, the nurse carries out the care plan; and in evaluation, the nurse assesses the effectiveness of interventions.

Correct Answer: B

Rationale: The correct answer is B because it encourages the patient to reflect on potential causes of their fatigue, leading to a more in-depth exploration of the issue. Option A focuses on stress, not necessarily fatigue. Option C is too specific and may not uncover underlying causes. Option D assumes sleep duration is the only factor contributing to fatigue.

Correct Answer: A

Rationale: The correct answer is A: When the WBC falls to 5,000mm3. This is because a low WBC count indicates potential bone marrow suppression from the drug. Resuming treatment at this point ensures the bone marrow has recovered enough to handle the drug's effects. Summary: - Choice B: Hair regrowth is not a reliable indicator of bone marrow recovery. - Choice C: A high WBC count suggests potential toxicity, not readiness for treatment. - Choice D: Anemia is a late sign of bone marrow suppression, not an appropriate indicator to resume treatment.

Correct Answer: D

Rationale: The correct answer is D: The patient is able to ambulate 25 feet without pain. This outcome indicates successful plan implementation for impaired mobility due to nerve compression. Ambulating without pain shows improved mobility and nerve compression relief. Choices A, B, and C do not directly address mobility improvement. Choice A focuses on pain level, which is important but not a direct measure of mobility. Choice B refers to upper extremities, not the lower extremities affected by lumbar disk herniation. Choice C addresses medication management, not mobility improvement.

Correct Answer: C

Rationale: Rationale for Choice C (Correct Answer): 1. Multiple sclerosis (MS) commonly affects the optic nerve and chiasm. 2. MS is characterized by demyelination of nerves, leading to visual disturbances. 3. Optic nerve involvement results in vision problems, such as blurred vision. 4. Chiasm involvement can cause visual field deficits and color perception changes. Summary of Other Choices: A: Lateral, 3rd, and 4th ventricles - Incorrect. MS primarily affects the central nervous system, not ventricles. B: Pons, medulla, and cerebral peduncles - Incorrect. While these areas are part of the brainstem, they are not commonly affected in MS. D: Above areas - Incorrect. This choice is vague and does not specify any specific areas affected by MS.