The nurse is preparing to administer a medication and reviews the patient's chart for drug allergies, serum creatinine, and blood urea nitrogen (BUN) levels. The nurse's actions are reflective of which phase of the nursing process?

A. Assessment is the first phase of the nursing process, during which the nurse gathers relevant patient data, such as allergies and lab values, to ensure safe medication administration. This step helps identify potential risks and contraindications. B. Evaluation occurs after the medication has been administered and involves assessing the patient's response to the drug. In this case, the nurse is reviewing information before administration, making evaluation an incorrect choice. C. Implementation refers to carrying out the nursing interventions, such as actually administering the medication. Since the nurse is still reviewing data, this step has not yet been reached. D. Planning involves setting goals and determining appropriate interventions, but it does not include the direct collection of patient data. Reviewing lab values and allergies falls under the assessment phase.