Technician A says that oil pressure that fluctuates from high to low can be caused by a sticking oil pump pressure relief valve. Technician B says that a stuck-closed pressure

Technician A says that oil pressure that fluctuates from high to low can be caused by a sticking oil pump pressure relief valve. Technician B says that a stuck-closed pressure relief valve will result in high oil pressure at idle (at normal operating temperature). Who is right?
A)Technician A only
B)Technician B only
C)Both A and B
D)Neither A nor B

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