Answer:
D. product modification.
Explanation:
This is an example of Product Modification which refers to the improvement of the existing products by making necessary changes in terms of features, quality, etc,.The purpose of the product modification is to maintain existing demand, attract new users and to face the competitors effectively to increase the profits of the enterprise also as here Lindsay's company plans to release a new version of its signature television set having advanced features, including better sound quality and high definition to maximize its profits and defeat the competitors.