Technician a Says Typically, an Engine Coolant Temperature (ECT) Sensor

Multiple Choice

Technician A says typically, an Engine Coolant Temperature (ECT) sensor will not read properly if the coolant is low. Technician B says a Cylinder Head Temperature (CHT) sensor will read correctly because it doesn't rely on coolant level. Who is correct?

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