Final answer:
An increase in production costs can lead to a decrease in the quantity supplied, while technological advancements and government subsidies can lead to an increase in the quantity supplied. Option C
Step-by-step explanation:
A decrease in the quantity supplied can result from an increase in production costs. When the costs of production such as wages and raw materials increase, firms may reduce the quantity they are willing to supply at each price level, leading to a leftward (or upward) shift in the supply curve. For example, if the price of labor increases, firms may choose to produce less due to higher costs.
An increase in need, such as an increase in demand, does not result in a decrease in quantity supplied, but rather an increase in the quantity supplied. Technological advancements and government subsidies can also lead to an increase in the quantity supplied. Option C