Concept:Small-scale retailers operate on a minimal capital scale, while large-scale retailers like supermarkets require significant investment and space.
Explanation:Roadside traders, urban stores, and itinerant traders are all examples of small-scale retail businesses.
They typically operate in open markets, small shops, or move from place to place.
Supermarkets, however, are large-scale retail establishments that sell a wide range of products in a spacious, organised setting.
Therefore, supermarkets do not belong to the category of small-scale retailers.
Answer:C. Supermarkets