In a book by James S. O'Rourke, IV named <em>The Truth about Confident Presenting: All You Need to Know to Make Winning Presentations, Fearlessly and Painlessly.</em>
He talks about how distinguished speakers realize that the secret to achievement is driven by only a few universal values.
You should think carefully about having a memorable conclusion. You may be questioning those interested, or you may be able to link back to the introduction and give the audience a sense of a full circle coming in.
"Mrs. Pontellier will ask Mrs. Ratignolle to help her learn how to better plan proper menus for her family" is the best option from the list but it should be noted that this is subjective.