13. A change in the quantity of a good supplied is reflected in all except one of the followings. A. A movement along a supply curve B. An increase in the amount of a good offered for sale as a result of a change in price of that good C. A decrease in the amount of a good offered for sale as a result of a change in the price of that good D. A change in the amount of a good offered for sale as a result of lowered production costs