Don Was Giving a Presentation on New Production Guidelines When

Don was giving a presentation on new production guidelines when he noticed Mr. Osaka, a hearing impaired audience member, looking at his phone. Don became distracted and was upset about Mr. Osaka using his phone during his presentation. What is most likely the reason Don should not be upset by this behavior?

A) What Mr. Osaka was doing was probably more important than Don's speech.
B) It is now acceptable etiquette to use phones while people are talking.
C) Mr. Osaka was probably adjusting the volume of his hearing aid.
D) Mr. Osaka had trouble hearing the speech so he was checking his work email instead.
E) Mr. Osaka's behavior was a good signal of when Don needed to talk louder.