How Does a National Retailer Benefit from Selling Private-Labels

How does a national retailer benefit from selling private-labels?

A) The retailer spends less on advertising private-label brands and therefore saves money.
B) Since the retailer carries the cost of advertising of a private-label,the costs are covered by the consumer.
C) Since nationwide stores carry the private brands,it gives little choice to the consumer about assortments.
D) Since it is a national retailer,customers will naturally know the private-label.
E) By selling private-labels,a national retailer can differentiate its assortments.