When Planning to Demonstrate a Product for a Buyer, What

When planning to demonstrate a product for a buyer, what should a salesperson do?

A) make sure that the product being demonstrated is typical of what is being recommended and that it is in good working order
B) to facilitate up-selling, demonstrate the top-of-the-line model with every possible feature the buyer would want
C) to increase involvement, suggest that the buyer perform the demonstration
D) to replicate the customer experience and build rapport, the salesperson should not handle the product before the demonstration