Answer:
Option (d) is correct.
Explanation:
Economies of scale occurs when the average total cost decreases as the output increases.
Dis-economies of scale occurs when the average total cost increases as the output increases.
In the long-run,
When output is 2,400 candy bars, the total cost is $1,200
Average total cost = Total cost ÷ Output
= $1,200 ÷ 2,400
= $0.5
When output is 2,900 candy bars, the total cost is $1,400
Average total cost = Total cost ÷ Output
= $1,400 ÷ 2,900
= $0.48
In the given case, average total cost is falling as output rises.
So, the candy bar company exhibits economies of scale because average total cost is falling as output rises.