After the foreign currency valuation run, how does the system evaluate the balance of this account?

You have a bank account in foreign currency. During the period you have posted various deposits to and withdrawals from the account.

After the foreign currency valuation run, how does the system evaluate the balance of this account?
A . in local currency, with the exchange rate valid on the last day of the period
B . In foreign currency, converted to local currency on a statistical ledger.
C . In foreign currency, with no need for conversion.
D . In local currency, with the exchange rate valid for each transaction

Answer: A