Technician a Says the Engine Coolant Temperature (ECT) Sensor Is

Multiple Choice

Technician A says the engine coolant temperature (ECT) sensor is an electro-magnetic type of sensor. Technician B says the Powertrain Control Module (PCM) or Transmission Control Module (TCM) uses the ECT to vary shift timing and pressure based on engine temperature. Who is correct?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B