Answer:
The correct answer is letter "D": implementing product ideas
Explanation:
The new product development has seven steps which are: Idea Generation, Idea Screening, Concept Development and Testing, Market Strategy Development, Business Analysis, Product Development, Marketing Testing, and Commercialization.
Phase I of this approach only comprehends the conceptualization of the product that is intended to be provided, thus the implementation of product ideas does not belong to this stage.