Answer:
B. This is good because the value of GDP increases in both countries due to the increase in value added.
Step-by-step explanation:
The production approach measures the GDP by calculating the difference between the selling price of a good or service, minus the cost of all the goods and services used to produce that good. This approach calculates the value added to the inputs needed to produce certain output.
Even though both countries will benefit from the increase in their GDP, Utopia should benefit more.