Final answer:
If an accord agreement is breached by the debtor, the creditor may choose to sue either on the original contract or for breach of the accord agreement.
Step-by-step explanation:
In the case of an accord agreement being breached by the debtor, the creditor may choose to sue either on the original contract or for breach of the accord agreement. They are not required to sue on both. So the correct option is B - by the debtor, the creditor may sue either on the original contract or for breach of the accord agreement.