A scientist is giving a presentation on the Milky Way at an astronomy conference. How will the composition of her audience affect the information she includes in her presentation? She should address her audience as beginners by discussing the basics about the topic in a straightforward way. She should address her audience as experts by reporting the results of her research without providing basic information or defining simple concepts. She should pick a narrower topic that is appropriate for an astronomy convention. She should prepare a presentation for a general audience by providing some standard information and by defining concepts without oversimplifying.