Technician a Says the Primary Purpose of a Thermostat

Multiple Choice

Technician A says the primary purpose of a thermostat is to cause the engine to warm up as soon as possible.Technician B says the thermostat should be removed from the cooling system only if the engine is overheating.Who is correct?

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