Answer:
d. Product enhancement
Step-by-step explanation:
When a company creates a product that extends, enhances, and encourages the customer beyond delivering its core, this concept is called product enhancement. It is basically the mechanism of change where we try to enhance and improve our product or services to enhance its core value which can definitely increase its performance and therefore, customer expectations. The main job is done by the product managers, they have to take this core responsibility of coming up with the better and improved product. Organizations should take it as a continual mechanism in order to add value in their products on the continuous basis in order to remain competitive in the market.