The demand for labor would move downward like a consequence of: (w) grocery stores buying fewer automatic check-out touchpad computers, and in place of relying more heavily on cashiers to ensure friendly interactions along with customers. (x) declines in the productivity of factory workers. (y) increases into the price of a dozen Krispy Kreme doughnuts by $4 to $4.50. (z) the income effect.
Can anybody suggest me the proper explanation for given problem regarding Economics generally?