Which of the Following Is True of JND

Which of the following is true of JND?

A) Decreasing prices below consumers' JND is likely to cause a significant rise in sales.
B) Making product improvements that far exceed consumers' JND is likely to maximize company revenues.
C) There is no JND for decreased product volume sold in existing packaging.
D) Making drastic changes to a company's logo to an extent well beyond consumers' JND allows companies to update their image without losing their ready recognition.
E) Increasing prices below consumers' JND is likely to go unnoticed by consumers.