Answer:
C.
Step-by-step explanation:
Efficiency is manifested in the proper use of time, and resources for an intended purpose. Meaning, it is doing things right.
Production efficiency is based on a business's ability to produce the highest number of units of a good while using the least amount of resources possible.
Also, is the comparison of what is actually produced or performed with what can be achieved with the same consumption of resources (money, time, labor, etc.).
In this example, the firm has already meet the efficient point. It is not possible to produce the same level of production with less resources.