The correct answer is: D. Movement along the supply curve.
A change in the price of a good will cause a movement along the supply curve, not a shift in the supply curve. This is because a change in price is a change in the quantity supplied, not a change in the supply itself.
The supply curve shows the relationship between the price of a good and the quantity of that good that producers are willing and able to supply. The supply curve is upward-sloping, which means that producers are willing to supply more of a good at a higher price. This is because producers have higher costs at lower prices, so they need to charge a higher price in order to make a profit.
When the price of a good changes, producers will adjust their production accordingly. If the price of a good increases, producers will be willing to supply more of that good. This will cause a movement along the supply curve to the right. If the price of a good decreases, producers will be willing to supply less of that good. This will cause a movement along the supply curve to the left.
A shift in the supply curve, on the other hand, occurs when something other than the price of the good changes. This could be a change in the cost of production, a change in technology, or a change in the number of producers. When the supply curve shifts, it indicates that producers are willing to supply a different quantity of the good at any given price.
In conclusion, a change in the price of a good will cause a movement along the supply curve, not a shift in the supply curve.