Josh’s dog, Ginger, has run away so Josh places reward poste…

Josh’s dog, Ginger, has run away so Josh places reward posters throughout the neighborhood offering $500 for anyone who brings Ginger home safely. Amanda, Josh’s colleague sees Ginger and brings her back to Josh without ever seeing a poster. After returning the dog, Amanda then sees one of the reward posters and returns to claim the money. Which of the following is true of this situation?