Technician a Says That a Sliding 5th Wheel Should Be

Technician A says that a sliding 5th wheel should be installed on a tandem drive tractor so that its furthest point of forward travel is directly over the bogie centerline.Technician B says that a sliding 5th wheel should be installed on a tandem drive tractor so that its rearmost point of travel should be directly over the rear drive axle centerline.Who is correct?

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