Negotiators who help to sell the vendor's products, such as real estate agents selling residential property on behalf of their clients; also known as brokers.

• A. Advertising
• B. Channels of distribution
• C. Direct mail
• D. Agents

Answer: (D)

This item tests the role of intermediaries who negotiate sales on behalf of sellers. These negotiators act as brokers or agents and handle tasks like finding buyers, negotiating terms, and completing the sale for the vendor, earning a commission. In real estate, the term agent (often called a broker) is the standard label for someone who represents the seller in residential property transactions. Advertising is about promoting products; it doesn’t perform the seller’s negotiations. Channels of distribution refers to the whole network of intermediaries and routes for getting products to market, not the specific negotiator on behalf of the vendor. Direct mail is a promotional tactic aimed at potential buyers, not the representation of the seller in a sale.