Technician a Says That a Knocking Noise in the Engine/transmission

Technician A says that a knocking noise in the engine/transmission area is typically a bad front pump in the transmission. Technician B says that a knocking noise in the engine/transmission area is more likely to be loose flex plate bolts. Who is correct?

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