• The correct answer is d) new product development.

The business concept known as new product development is related to the process of bringing new ideas of products to the market. This concept is closely linked to innovation. One of the most important characteristics of new product development is to bring the new product to the market as soon as possible in order to capitalize on the opportunities derived from product innovation. Additionally, the three essential variables that need to be included in the new product development are quality, time, and cost. These three variables will help to satisfy the consumer needs and to increase the market share. Apple has implemented this strategy as one of its most important features that add a special value to their products. There are always new features that Apple develops in its existing and new products. Therefore, the correct answer is option d). On the other hand, all other others are concepts that are not associated with the diversity of new products and services that is characteristic of Apple.