A is a group of product or service items that are closely related because they satisfy a class of needs, are used together, are sold to the same customer group, are distributed through the same outlets, or fall within a given price range..

The correct answer is product line.

Explanation:

A product line is, in its most general aspect, a grouping of products that are related to each other by some of their characteristics, whether by reason of use, distribution, segmentation or price. Within marketing theory, as regards product strategy, it is one of the levels in which the product hierarchy is disaggregated and one of the factors on which the marketing strategy is worked. Below is a brief bibliographic review that will allow us to expand this concept.

answer(c) factors of production;