Final answer:
The disadvantage of voice-pitch analysis over other physiological reaction measurement techniques is that it requires sophisticated computer equipment.
Step-by-step explanation:
The answer is c. Requires sophisticated computer equipment.
Voice-pitch analysis has several advantages over other physiological reaction measurement techniques, such as measuring the direction of the subject's feeling and being relatively less time-consuming and less expensive to use. However, one disadvantage of voice-pitch analysis is that it requires sophisticated computer equipment, unlike some other techniques that may not have this requirement.