题目内容：
Great business presenters relate their ideas and concepts to their audience by using simple, powerful diagrams instead of relying on text-based slides. In fact, drawing diagrams forces a presenter to make the idea clear even at the preparation stage.The speaker can help the audience remember the message longer by ___________.
A、displaying text-based slides
B、avoiding long technical terms
C、focusing on the width of coverage
D、using simple and powerful diagrams
参考答案：