Which is not true regarding the formation of a suretyship?

A) The suretyship agreement must be in writing.

B)It involves three parties - the principal debtor, a creditor, and the surety (as secondary obligor).

C) Consideration is required to make the suretyship agreement binding on the surety.

D) A creditor's extension of credit to the principal debtor can never be sufficient consideration to enforce the surety's promise.