Answer:
Neither Technician A nor B
Explanation:
TP sensor or the throttle position sensor is a device which checks the intake of air of an engine. It is installed at the shaft or at the spindle which checks the throttle's position.
If the throttle position sensor goes bad, then vehicle will lack power when accelerating, low speed, car would idle slowly, etc.
Thus both the technician A as well as technician B are wrong when technician A says that the signal voltage is little low and technician B says that TP sensor ground circuit has excessive resistance.
Hence the answer is --
Neither Technician A nor B
