Answer:
The correct answer is option C.
Step-by-step explanation:
Two cities are planning to demolish their old stadiums and build new ones.
Keeping everything else equal, the old stadium cost $5 million to build in one city and $50 million to build in the other.
These construction costs are sunk costs that have been incurred and cannot be recovered. Since these costs cannot be any longer recovered they should not be considered in deciding future investments.