30.Technician A says temperature sensors that decrease in resistance as the temperature increases are called positive temperature coefficient (PTC) sensors. Technician B says that some vehicle manufacturers use a stepped ECT circuit inside the PCM to broaden the accuracy of the sensor. Which technician is correct?
(A)Technician B only.
(B)Both Technician A and Technician B are correct.
(C)Neither Technician A nor Technician B is correct.
(D)Technician A only.