The manager of a local grocery store introduces a short conveyor belt that allows customers to place items on it prior to checking out. this saves the cashier from the physical strain of bending forward and reaching into the carts to retrieve the items. this change is an example of the approach to job design.

Hours to produce one unit worker hours to produce yarn country a 8 hours country b 4 hours worker hours to produce fabric counrty a 12 hours country b 13 hours additional worker hours to produce fabric instead of yarn country a ? country b? which of the follow is true of the trade relationship between country a and country b? country a has an absolute advantage in producing yarn and fabric country b has an absolute advantage in producing yarn and fabric country b has a comparative advantage to country a in producing fabric country a has a comparative advantage to country b in producing fabric