Dora, who was eight years old, went to the grocery store with her mother. Dora pushed the grocery cart while her mother put items into it. Dora's mother remained near Dora at all times. Peterson, another customer in the store, noticed Dora pushing the cart in a manner that caused Peterson no concern. A short time later, the cart Dora was pushing struck Peterson in the knee, inflicting serious injury. If Peterson brings an action, based on negligence, against the grocery store, the store's best defense will be that 
a store owes no duty to its customers to control the use of its shopping carts. a store owes no duty to its customers to control the conduct of other customers. any negligence of the store was not the proximate cause of Peterson's injury. a supervised child pushing a cart does not pose an unreasonable risk to other customers.