Answer:
Anna should interpret her boss's advice "Know your audience" as the importance of understanding the specific characteristics and needs of the group of executives she will be teaching. This may include researching their background, understanding their job roles and responsibilities, and being aware of any specific challenges or goals they may have related to the training topic. Additionally, Anna should be mindful of the different communication and teaching styles that may be effective or not effective with this particular audience, and adjust her approach accordingly. It may be helpful for her to tailor her training content and delivery to the executives' level of knowledge and experience. Finally, it's not recommended to spend most of the class time on small talk.