Concept: A change in the price of a commodity causes a movement along the supply curve, not a shift of the curve.
Explanation:When the price of a commodity changes, other factors remain constant.
This leads to a change in the quantity supplied, not a change in supply itself.
A higher price increases the quantity supplied along the same supply curve.
A lower price decreases the quantity supplied along the same supply curve.
A change in supply would only occur if non-price factors, such as production cost or technology, changed.
Answer: D. A change in the quantity supplied.