Technician A says that a Bosch Motronic system will not enter closed loop until the engine coolant and the oxygen sensor have both reached a specified operating temperature. Technician B says that a...

Technician A says that a Bosch Motronic system will not enter closed loop until the engine coolant and the oxygen sensor have both reached a specified operating temperature. Technician B says that a Bosch Motronic system is not a feedback system and operates in open loop under all driving conditions. Who is correct?

A. Technician A only

B. Technician B only

C. Both technicians

D. Neither technician