Answer:
c
Explanation:
As a result of an increase in efficiency in production, there would be an increase in supply. As a result, there would be an outward shift of the supply curve. When the supply curve shifts outward, supply increases and prices of drugs fall.
On the other hand, if there is an inward shift of the supply curve, the supply of drugs would fall and the price of drugs would increase
Please check the attached image showing a graph of a decrease in supply
