Final answer:
The most appropriate teaching method for a dietitian's workshop on infant formula preparation is demonstration, as it effectively shows practical skills, involves participants, and offers real-time question-and-answer opportunities.
Step-by-step explanation:
The most appropriate teaching method for a dietitian providing a workshop about proper preparation of infant formula to 20 women would be demonstration. Demonstrations are effective for showing practical skills and can ensure that all participants clearly understand the process. This method allows the dietitian to display each step of formula preparation, address any safety concerns, and answer questions in real-time, fostering a hands-on learning environment. For instance, the dietitian could show how to sterilize bottles, measure and mix formula, and safely store it. This interactive approach can be far more impactful than a lecture, which may not fully engage participants or cater to those who are visual or kinesthetic learners. While role-playing and discussion have their benefits, they may not be as suitable for procedural and practical tasks like formula preparation.