Which of the Following Is Good Advice Concerning the Use

Which of the following is good advice concerning the use of demonstrations as part of a sales presentation?

A) If your prospect has seen a competitor's demonstration, skip over parts of your demonstration that would be redundant.
B) Allowing previous buyers of your product to assist you in your demonstration is dangerous and should be avoided.
C) Make your demonstration a separate, stand-alone activity.
D) If the demonstration includes dead time, plan what you will do during the lull.
E) All of the above is good advice when using demonstrations as a part of the sales presentation.