Which of the Following, in Itself, Would Be Expected to Have

Which of the following, in itself, would be expected to have the LEAST effect on individual differences in emotional processing of a particular stimulus?

A) Differences in the physiological changes induced by the stimulus.
B) Differences in the cognitive appraisal of the stimulus.
C) Differences in the neural structures that process emotional stimuli.
D) Differences in the gender of individuals processing the stimulus.