Which of the following is TRUE about the education-based marketing？

A. You take on the role of a salesperson and deliver a sales message to your target market.
B. You take on the role of a consultant and tell clients about their problems and the solutions you can provide.
C. You need to provide them with good education opportunities if the clients decide to buy your products.
D. You must make sure that the education-based marketing materials must come from marketing text books.