Sampling for a Product Such as Expensive Skin Cream That

Sampling for a product such as expensive skin cream that is designed to reduce wrinkles over a long period of time might not be feasible because:

A) it cannot be broken down into small sizes.
B) it may be too expensive to give away sample sizes that would be adequate to demonstrate the cream's benefits since it has to be used repeatedly.
C) it may be too difficult to find a way to distribute the samples.
D) consumers may think it is of poor quality since samples are being given away.
E) it would create an easily imitated competitive advantage.