Answer :
In this situation, the MOST professional and effective way for Nadine to respond to her audience appearing bored during her presentation would be to do something unexpected to try to promote engagement. Here's why:
1. **Engagement**: Doing something unexpected can grab the audience's attention and bring back their focus to the presentation. It could be something like asking a thought-provoking question, telling a relevant story, or incorporating interactive elements like a quick activity or a poll.
2. **Maintaining Professionalism**: By choosing to do something unexpected yet relevant to the topic at hand, Nadine can demonstrate her flexibility, creativity, and commitment to keeping her audience engaged in a professional manner.
3. **Showing Adaptability**: Being able to adjust her approach in real-time based on the audience's response shows that Nadine is adaptable and responsive to the dynamics of the situation. This can help salvage the presentation and leave a positive impression on her audience.
4. **Encouraging Participation**: By promoting engagement through unexpected means, Nadine can encourage audience participation, which can make the presentation more interactive and memorable for the attendees.
By choosing to do something unexpected to promote engagement, Nadine can potentially turn the situation around, re-engage her audience, and deliver a more impactful presentation.