Shift from production level B to production level A results in opportunity cost in the production of output x and would be considered an efficient use of resources. Thus the correct answer is C.
A level of production done by manufacturing units or organizations to maintain the supply of materials for the smooth operation of the business is referred to as the production level.
Technology advancement, changes in resources, greater knowledge or training, and labor force are all factors that create shifts in the production possibilities curve.
Therefore, the correct answer is C which shows efficient use of resources by resulting in opportunity cost.
Learn more about production, here:
https://brainly.com/question/23987161
#SPJ2