A supercenter is exemplified by

• A. A store that only sells groceries
• B. A gigantic retail facility with a broad product range under one roof
• C. A small neighborhood store
• D. An online-only retailer

Answer: (B)

Think of a supercenter as a single, very large store that offers both groceries and a wide range of non-food items all in one place. The description that matches this idea best is a gigantic retail facility with a broad product range under one roof, because it highlights both the large size and the variety of products available in one visit. The other options don’t fit: a store that only sells groceries is a grocery store, not a supercenter; a small neighborhood store isn’t large or broad enough in its offerings; and an online-only retailer doesn’t have a physical, single-location shopping experience.