Read the following paragraph, and then choose the best topic sentence. One technique the store uses is to put most of the basic food items, such as eggs and milk, at the back. Customers have to walk through the entire store to get to them. On the way, they may notice other products to buy. Another stragety SuperFoods uses is to put more expensive items on shelves at the customer's eye level. Less expensive brands are on the bottom shelves, so customers don't see them easily. This makes customers more likely to choose more expensive products. Finally, SuperFoods doesn't have any clocks or windows. It's hard for customers to know what time it is, so they tend to spend more time shopping in the store. The best topic sentence is: