When creating a pricing adjustment, what should a developer do to make sure that the user can understand why the price has been adjusted?

When creating a pricing adjustment, what should a developer do to make sure that the user can understand why the price has been adjusted?
A . Use a dear name for the pacing adjustment
B . Include help text for the pricing adjustment
C . Include a configuration message for the pricing adjustment
D . Include display text for the pricing adjustment

Answer: D