Which of the following is false about a secured creditor in a bankruptcy?

a. A secured creditor must file a proof of claim to be treated as an unsecured creditor.

b. A secured creditor has the right to sell the secured property but does not have to.

c. A secured creditor has priority over unsecured creditors.

d. A secured creditor can choose to sell the secured property but the sale extinguishes any right to further payment.

e. A secured creditor can choose to be treated as an unsecured creditor.