What practice involves a salesperson eliminating or reducing the buyer's choice unethically?

The practice that involves a salesperson eliminating or reducing the buyer's choice unethically is manipulation. Manipulation in sales refers to tactics that deceive or coerce the buyer into making a decision that may not be in their best interest. This could involve withholding certain information, presenting facts in a misleading way, or applying pressure to hasten a decision.

In contrast, negotiation is a normal part of the selling process where both parties discuss terms to reach a mutually beneficial agreement, and it does not inherently compromise moral or ethical standards. Persuasion is an important skill in sales that aims to convince a buyer in a legitimate way, focusing on the benefits of a product or service without undermining the buyer's autonomy. Sales promotion, on the other hand, involves marketing strategies designed to increase the visibility or desirability of a product, and it does not eliminate choice but rather aims to attract consumers.

By clearly understanding these distinctions, one can see why manipulation is viewed negatively within the practice of professional selling.