Two technicians are discussing hydraulics. technician a says that if pistons of the same size are used, motion and force can be increased or decreased. technician b says that if a small piston acts upon a larger piston, the force of the larger piston will increase, but the distance it travels will decrease. who is correct? a. technician b only b. technician a only c. both technician a and b d. neither technician a nor b