根据原文第二段中的“You focus on the depth of coverage instead of the width (广度) of coverage. Additionally, you make your ideas visual and relevant, so the message is understood better and remembered longer. Great business presenters relate their ideas and concepts to their audience by using simple, powerful diagrams instead of relying on text-based slides.”可知，为了帮助观众对于信息的记忆，你应该强调深度而不是广度，使用简单的视觉性图表来传达信息，而不是用全文本的形式，因此D项正确。