New market disruptive innovation
Sustaining innovation is a term commonly used in the domain of innovation and entrepreneurship to describe the process of making improvements to existing products or services. This type of innovation is focused on enhancing and refining an existing product to better meet the needs of current customers, keeping pace with market demand, and typically targeting the high-end or more profitable segments of the market.
Given the options and definitions, sustaining innovation is the correct answer because it specifically aims to enhance a product to meet the needs of the high-end market. The primary objective is to refine and improve existing products for customers who value the improvements and are willing to pay for them.