Which of the following is true of the audience of presentations?

A) Presentations are most effective when the presenters presume to know their audience.
B) Audiences generally tend to be out of tune with the speaker.
C) Audiences usually react negatively to bad news when there is an organizational representative present.
D) Audiences from varied cultures have varied expectations regarding public-speaking norms.

Audiences from different cultural backgrounds may have different expectations when it comes to public speaking. It is important for presenters to be aware of these differences and tailor their presentations accordingly to effectively communicate with their audience. Option A is incorrect because assuming to know the audience can lead to miscommunication. Option B is incorrect because it generalizes all audiences as being out of tune with the speaker, which may not be true. Option C is incorrect because audiences may react differently to bad news depending on the situation and the individual attitudes of those present.