A nurse in a clinic is interviewing a client who will undergo diagnostic testing. The nurse should ask about a client's potential allergies during which phase of the nursing process?

Choice A reason: The planning phase involves setting goals and outcomes based on the data collected during assessment. Allergy information is critical to planning, but it must first be identified during the assessment phase. Choice B reason: Implementation is the phase where nursing interventions are carried out. Allergy information should already be known by this point to avoid adverse reactions during procedures or medication administration. Choice C reason: The assessment phase is the initial step in the nursing process where the nurse collects comprehensive data, including health history, current complaints, and allergies. This ensures safe and individualized care planning. Choice D reason: Evaluation involves determining the effectiveness of interventions and whether goals have been met. It does not involve initial data collection such as allergy history.