Technician a Says That After Rebuilding a Clutch, It Needs

Technician A says that after rebuilding a clutch, it needs to be air checked before the clutch plates are installed. Technician B says that clutches that are rebuilt outside of the transmission are typically air tested before installing them back in the transmission. Who is correct?

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