Which of the Following Would Not Be a Promise Statutorily

Which of the following would not be a promise statutorily made enforceable without consideration?

A) Hawkins, in good faith, changes the quantity of square yards of carpet ordered from Grant Mills.
B) Jones promises to pay his cousin's past-due cell phone bill.
C) Dodds signs and delivers a waiver of a claim arising out of a breach of contract by Keys.
D) A signed, written offer by Marcum Jewelers to sell four dozen 18" gold chains to the Alpha Sorority for $480 within the next 30 days.