Technician a Says During Transmission Overhaul All Fluid Passages Must

Technician A says during transmission overhaul all fluid passages must be inspected for debris by blowing them out with compressed air. Technician B says that during transmission overhaul each sprag must be fully disassembled and checked for damage. Who is correct?

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