Concept:A rightward shift of the supply curve means producers are willing to supply more at every given price.
Explanation:An increase in the level of technology improves production efficiency.
This lowers the cost of production and enables firms to supply more at the same price.
Therefore, the entire supply curve shifts to the right.
An increase in the price of the commodity only causes a movement along the same supply curve, not a shift.
Higher cost of production and higher taxation both reduce supply, shifting the curve to the left.
Answer:A. the level of technology