Pete Negotiates a Deal for the Sale of Certain Real

Pete negotiates a deal for the sale of certain real estate to Owen. Pete promises to hold the offer open in return for a small payment but does not state an exact period of time. With respect to this offer

A) the deal is binding except for Pete's promise to hold the offer open.
B) a reasonable period of time is implied.
C) Pete must hold the offer open for an indefinite period.
D) the deal is done.