When Testing a Potentiometer Type Throttle Position Sensor (TPS) with a DMM

When testing a potentiometer type throttle position sensor (TPS) with a DMM set to V-DC which of the following should be true?

A) signal voltage should exceed reference voltage
B) signal voltage should increase in steps through the pedal stroke
C) reference voltage should decrease as signal voltage increases
D) signal voltage should smoothly increase through the pedal stroke