Tom Makes Pottery in His Spare Time

Tom makes pottery in his spare time. Jackie asks if he'd sell her a covered bowl. Later that day, he telephones her and says she can have it for $50. She agrees, so he tells her he'll wrap it up for her and it will be ready in half an hour. Six days later, Jackie had not yet come for the bowl when a dog knocks the box off the shelf and breaks the bowl. Who is liable?

A) Tom, because Jackie had not yet received the bowl.
B) Tom, because the bowl was in his possession when the dog broke it.
C) Jackie, because she had identified the bowl.
D) Jackie, because Tom had tendered the bowl to her nearly a week earlier.