Technician a Says That One Reason OEMs Have Eliminated the Initial

Technician A says that one reason OEMs have eliminated the initial (break-in) lube drain on a new or rebuilt differential carrier is improved machining precision of current geartrain components.Technician B says that because synthetic gear lubes have superior ability to suspend abrasive contaminants,OEMs no longer require a break-lube change.Who is correct?

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