Borrower owes $10,000 to Lender, but fails to pay it back. The debt consists of a loan with a $7,500 principal, and $2,500 interest on the principal. The statute of limitations has expired and thereafter Borrower tells Lender that he is sorry and promises, "I will pay you back $7,500 by January 31 of the following year" ("January 31 Promise"). Borrower fails to pay the agreed amount by January 31. In a jurisdiction that follows the Restatement 2d of Contracts, which of the following most accurately states Borrower's obligation to Lender?
(A) Borrower enforceably owes Lender $7,500.
(B) Borrower enforceably owes Lender $10,000 as the January 31 Promise effectively revived the debt.
(C) Borrower owes Lender nothing because the January 31 Promise lacked consideration.
(D) Borrower owes Lender nothing because the statute of limitations on the original debt expired.