Walmart,the World's Largest Retailer by Revenue,announced That It Will Get

Walmart,the world's largest retailer by revenue,announced that it will get back to its founder's roots by initiating more price cuts.Critics claimed that the giant was getting away from its original focus because it posted relatively high gross profit margins.CEO Mike Duke assuaged critics by saying Walmart's $400 billion in sales will become even larger because the price cuts will attract more customers and it will lower its costs of goods sold.
-Refer to Walmart.Many Walmart stores have a full line of groceries and general merchandise with a wide range of services,such as a pharmacy,portrait studio,optical shop,and bank.Walmart is an example of which type of discount store?

A) hypermarket
B) supermarket
C) extreme-value retailer
D) supercenter
E) category killer