Which of the following statements is true of the absolute threshold? select one:
a. it is the amount of intensity needed for a person to detect a difference between something and nothing.
b. it is the intensity difference between two stimuli before people can perceive that the stimuli are different.
c. consumers will only consciously perceive a marketing stimulus when it is below the absolute threshold.
d. stimuli are presented below the threshold level of conscious awareness.
e. it is the activation of sensory receptors by stimuli presented below the perceptual threshold.