Which of the following will tell the audience their comments are welcome as long as they are not disruptive?

A) Automatically tweet key points from your presentation while you speak
B) Review comments after your presentation
C) Establish expectations with the audience
D) Monitor and ask for more meaningful feedback when inappropriate comments are sent
E) Integrate social media into the presentation process

Establishing expectations with the audience before beginning the presentation is the best way to communicate that comments are welcome as long as they are not disruptive. This can be done through verbal communication or by posting guidelines for comments somewhere visible. The other options, such as automatically tweeting key points or integrating social media, do not directly address establishing expectations for audience comments. Reviewing comments after the presentation or monitoring and asking for more meaningful feedback when inappropriate comments are sent are reactive approaches, rather than proactive.