What is a key requirement for transferring funds between a base currency bank account and a foreign currency bank account?

The correct choice indicates that for transferring funds between a base currency bank account and a foreign currency bank account, the system must display the default exchange rate. This requirement is essential because foreign currency transactions involve converting amounts from one currency to another, which is dependent on an exchange rate.

Having the default exchange rate displayed ensures that users can clearly see the rate at which the currency conversion will take place, allowing for accurate calculations and ensuring the transaction reflects the current market conditions. This assists in maintaining financial accuracy and transparency within the system.

In scenarios where the exchange rate is not displayed, users would not have a clear understanding of the conversion rate being applied, which could lead to errors in the amount transferred or misrepresentations in financial reporting. This makes the visibility of the default exchange rate crucial for any cross-currency transactions.