Technician A says a piston usually has a direction identifying notch that faces the rear of the engine. Technician B says a piston exhibits more wear on its major thrust

Technician A says a piston usually has a direction identifying notch that faces the rear of the engine. Technician B says a piston exhibits more wear on its major thrust side. Who is right?
A)Technician A
B)Technician B
C)Both technicians
D)Neither technician

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