Which one of the following contracts is enforceable? An ad in the paper promises to pay $5 for the return of a lost ring Mr. Ho promised to give his needy friend Mr. Jahn $100. Ms. Jones promised to pay an additional $100 to Mr. Wood if Wood finished the existing contract on time, according to the tern of the contract. Mr. Baker was so sick of an old chair that, when he saw Ms. Zee eyeing it with interest, he promised to gift it to her the following week