Two technicians are discussing the lower-end operation of an engine. technician a says that power loads result from the expansion of burning gases during the combustion process that push down on the piston and turn the crankshaft. technician b says that when the connecting rod is pulling the piston down from tdc (top dead center), the piston weight plus any ring friction and skirt drag puts a load on the connecting rod. who is right? a. neither technician a nor b b. both technicians a and b c. technician a only d. technician b only