Final answer:
D) Cooperative Retailers account for the smallest percentage of retail store sales in the U.S., with other forms like independent, franchise, and corporate retailers being more common.
Step-by-step explanation:
Among the forms of retail organization in the U.S., D) Cooperative Retailers comprise the smallest percentage of retail store sales.
This form of retailing involves various members of a co-op owning and operating the business collectively.
While co-ops can thrive in niche markets, they are generally less common than Independent Retailers, which are small "Mom and Pop" businesses, Franchise Retailers, which operate under a parent company's trademarks, and Corporate Retailers, which are large businesses owned by shareholders and are among the most prevalent in terms of U.S. retail sales.