In monetary debts, the most important result is to pay an interest. The debtor in default definitely has to pay interest even if he/she does not have fault in being in default and the other party is not suffering from any loss due to late performance. This is named as the default interest. If the creditor suffers more damage that cannot be covered with the default, interest and if the debtor has fault being in default this time the debtor has to pay the additional damages as well.

The correct answer is B.