How is the converted currency amount calculation on Opportunities determined?

Cloud Kicks (CK) operates in multiple countries and wants to track historical exchange rates. The consultant at CX has implemented dated exchange rates by using Advanced Currency Management.

How is the converted currency amount calculation on Opportunities determined?
A . The close date regardless of the opportunity stage
B . The close date only when the stage is closed
C . The current exchange rate regardless of the close date
D . The exchange rate at the time the opportunity is closed

Answer: A