What has happened when the quantity supplied decreases?A.Price has increased.B.Supply has increased.C.Supply has decreased.D.Price has decreased.

When the quantity supplied decreases, this typically indicates a shift in the supply curve to the left. This can happen for various reasons, such as increased production costs, natural disasters, or a decrease in the number of suppliers in the market. Here's the analysis of the options provided:

1. Price has increased (A): This is often the case because a decrease in supply, while demand remains constant, can lead to higher prices due to scarcity.

2. Supply has increased (B): This option is incorrect as a decrease in quantity supplied indicates that supply is not increasing.

3. Supply has decreased (C): This option accurately describes the situation—when the quantity supplied decreases, it indicates a decrease in supply.

4. Price has decreased (D): This is generally incorrect as a decrease in supply tends to increase prices due to heightened demand relative to the available supply.

Considering these points, the most accurate answer to the question is option C. Supply has decreased. This option directly correlates with the definition of a decrease in quantity supplied.