Studies Employing Neurophysiological Responses to Measure Temperament Have Found All

Studies employing neurophysiological responses to measure temperament have found all of the following except

A) there are few differences between extremely shy and extremely bold children in heart rate reactivity to unfamiliar people and events
B) inconsistent correlations exist between infants' temperament classification and levels of the stress hormone cortisol
C) high reactive infants appear to be genetically predisposed to have a lower threshold for activation of the sympathetic nervous system
D) compared to uninhibited children, inhibited children show greater pupilary dilation and larger changes in blood pressure in response to novel stimuli