Concept:Middlemen, especially retailers, stock goods from many different producers, giving consumers more choice.
Explanation:Retailers buy from several manufacturers and display a wide range of products in one place.
This saves consumers from going to each producer separately.
It also allows buyers to compare brands, quality, and prices easily.
Therefore, the major merit of keeping middlemen is that they stock goods produced by different manufacturers.
Answer:D. stock goods produced by different manufacturers.