Which of the following examples can be classified as an accounts receivable?

• Due to an extra shipment, the Animal Shop had a special this week on kitty litter.
• The Animal Shop signed up for a new credit card to receive 0% financing for the first six months.
• The Animal Shopdecided a goldfish could stay for a week and they'd be paid when it was picked up.
• The building management company agreed that The Animal Shop could pay September's rent in October.