CrazyShop is a retailer that sells products online. CrazyShop is only a website, the company does not have inventory. When a customer orders a product from CrazyShop the order is sent to a manufacturer and the manufacturer ships the product directly to the customer. CrazyShop never touches the inventory. According to the eTextbook, this type of order is called $a(n)$ :

Wholesale shipment

Chargeback

Lean shipment

Bullwhip effect

Drop shipment