Which of the Following Best Described Weber's Law

Which of the following best described Weber's Law?

A) People usually see what they expect to see, and what they expect to see is usually based on familiarity, previous experience or a preconditioned set.
B) People are also stimulated below their level of conscious awareness; that is, they can perceive stimuli without being consciously aware of the stimuli in question.
C) When consumers are exposed to over a thousand marketing messages in a week, however they selectively focus on those that are relevant to them.
D) The just noticeable difference between two stimuli was not an absolute amount, but an amount relative to the intensity of the first stimulus.