The Nominal Group Technique doesn't work particularly well when individual judgments and expertise are valued

The healthy human ear has a frequency range of:

A. 20-20,000 Hz. B. 35-18.000 Hz. C. 35-20,000 Hz. D. 40-22,000 Hz. E. 50-50,000 Hz.

As explained in your textbook, a real-time online speech is 

A. most often presented with the speaker sitting while talking into a webcam. B. viewed by the audience as it is being delivered. C. given only when the speech cannot be recorded in advance. D. All the answers are correct. E. both viewed by the audience as it is being delivered and most often presented with the speaker sitting while talking into a webcam.