David owned a ranch with about four miles of white post-and-wood fencing. David left the ranch for a month to tend to business back East, and while he was gone, Peter and Paul came by his home and left a flyer on his front door. It said "Peter and Paul's Pretty Good Fence Repair Company is in the area, and will repair and paint all fencing to look like new. We'll be working in the ranch lands, so if there are any areas of fencing that you don't want to be repaired and painted, please hang a white cloth on that section of fencing so we'll know you don't want our services." David came home a couple of weeks later and found his fencing repaired and painted, and a note on his front door explaining that the service had been provided, and the bill was enclosed.

Which of the following is most correct?