Which are the four basic elements of supply?

The correct answer identifies four key components that impact the supply side of an economy. Understanding these elements is critical for analyzing how markets function.

Cost of production refers to the expenses incurred when producing goods or services. If production costs increase, suppliers may produce less of a good unless they can raise prices to maintain profit margins.

The price of other goods is also crucial because it reflects the opportunity cost associated with producing one good over another. If the price of a substitute good rises, suppliers may redirect resources to produce that more profitable good, thereby affecting the supply of the original product.

Entrepreneur expectations, or the anticipations that producers have about future market conditions, directly influence supply levels. If entrepreneurs expect higher future prices, they may increase current supply in anticipation of greater profits.

The number of sellers in a market also affects supply. An increase in the number of sellers usually leads to increased overall market supply as more producers enter the market.

Therefore, recognizing these four elements helps in understanding how supply responds to various economic factors, making option B the most appropriate choice in this context.