X Is a Homeowner Who Is Renovating His House and Needs

X is a homeowner who is renovating his house and needs it to be completed in two weeks.Y is the contractor who has promised to finish the job in the stipulated two weeks.Four days from the expected time of completion, Y says that she cannot finish the job on time.X offers to pay Y more money to have the house completed on time.Y completes the job on time but X refuses to pay the extra money that he promised.Has Y provided consideration for X's promise to pay more money?

A) Yes.Y has finished the job on time.
B) Yes.Y has accepted X's offer.
C) No.Y has done no more than fulfil an existing legal obligation.
D) No.Y has not paid X any money.