Final answer:
The nursing process step that applies to a client's accurate summarization of self-management strategies is the Evaluation phase, which assesses the effectiveness of the nurse's educational intervention.
Step-by-step explanation:
The step of the nursing process that applies to the client's summarization of major self-management strategies associated with their drug is Evaluation. During this phase, the nurse determines the effectiveness of interventions and whether the client has achieved the outcomes specified in the care plan. In this case, the client's ability to accurately summarize the precautions and self-management strategies indicates that the teaching was effective, which is an important part of patient education under direct supervision of a registered nurse.