The aggregate demand curve assumes that as the price of a good or service increases, nominal wages decrease as the price of a good or service increases, nominal wages decrease A as the domestic price level increases, consumers substitute domestic goods for foreign goods as the domestic price level increases, consumers substitute domestic goods for foreign goods B all prices and total consumer incomes are constant all prices and total consumer incomes are constant C changes in the price level affect real wealth changes in the price level affect real wealth D nominal interest rates increase as the price level decreases