Final answer:
The best strategy for teaching an older adult about medication and healthy lifestyle is to allow extra time for teaching and questions, accommodating the learner's pace and encouraging a comfortable learning environment.
Step-by-step explanation:
The best teaching strategy for an older adult patient about medication and a healthy lifestyle is D. Allow extra time for teaching and questions. This approach is respectful of potential age-related changes in cognition and processing speed and acknowledges that older adults may need additional time to understand and assimilate new information. It also fosters an environment where the patient feels comfortable asking questions and clarifying doubts, which is essential for effective learning and adherence to medical advice. Although it's essential to provide information that is neither overwhelming nor overly simplified, tailoring the pace of teaching to the learner's needs is of utmost importance.