Answer:
The correct answer is letter "D": can be based on either real or perceived differences in products.
Explanation:
Product differentiation is a marketing tool companies used to distinguish their products or services from the competitions. Generally the more a product is differentiated and, thus, made unique, the more a company can charge for it. Product differentiation is usually subjective since its goal is to change customer's perception of the benefits of a product over another. Though sometimes the information provided can be objectively true.