Final answer:
A trade allowance is a discount or deal that is offered to a retailer or wholesaler to encourage them to stock, promote, or display a manufacturer's product.
Step-by-step explanation:
The correct answer is a trade allowance. A trade allowance is a discount or deal that is offered to a retailer or wholesaler to encourage them to stock, promote, or display a manufacturer's product. It is a common practice in the business world for manufacturers to provide trade allowances to retailers in order to incentivize them to carry and promote their products.