Which of the Following About Sensory Thresholds Is False

Which of the following about sensory thresholds is false?

A) As a rule of thumb, a billboard should contain no more than six words because of typical human sensory thresholds.
B) The just noticeable difference is the amount of incremental change required for a person to detect a difference between two sensory stimuli.
C) Adaptation is the process of becoming desensitized to sensual stimuli.
D) Decreasing the amount of product offered in a package while staying below the just noticeable difference is called package-pricing.
E) Marketers always want product changes to fall below the just noticeable difference.