Howard Taped Pictures of Rainbows All Around the Room as Presentation

Multiple Choice

Howard taped pictures of rainbows all around the room as presentation aids for his speech. He never referred to them, but simply created an atmosphere for his presentation. Was this appropriate?

A) Yes; the pictures created the kind of mood the speaker wanted.
B) No; there were too many of them to create any kind of effect.
C) Yes, because rainbows are happy images and help the audience listen.
D) No, because you should explain your presentation aids, not just show them.