Which of the following reflects unethical decision-making in marketing?

Manipulating prices for deceptive sales is a prime example of unethical decision-making in marketing because it involves intentionally misleading customers. This practice can create a false perception of value, causing consumers to make purchasing decisions based on inaccurate information. For instance, if a retailer advertises an inflated original price and then discounts it significantly, customers may believe they are getting a better deal than they actually are. This not only violates ethical standards by undermining trust but can also damage the brand's reputation in the long run, as consumers may feel exploited once they realize the deception. Such actions go against principles of honesty and integrity that are fundamental to ethical marketing practices.

In contrast, the other options—transparency in advertising, prioritizing customer feedback, and ensuring product safety—represent ethical approaches that build trust and customer loyalty, which are essential for the long-term success of any business.