Of the following public speaking strategies, which ones can be used at the beginning of an academic presentation to both attract the audience's attention and briefly introduce your research topic?
选项：

A:Set up a contrast using examples or arguments relevant to your research topic to intrigue the audience.
B:Ask the audience an interactive question that is related to the topic of your presentation. 
C:Use a vivid analogy to make an abstract research topic easier to be understood. 
D:Use typical life-related examples to bring out the research topic and emphasize its significance at the same time.